Number 64

A page of the Numeropedia - the Special Encyclopedia of Numbers

[60-69]6061 - 62 - 63 - 64 - 6566 - 67 - 68 - 69

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[Chemistry]  The atomic number of Gadolinium (Gd). An element in the Lanthanide series: Lanthanum (57) to Lutetium (71).

[Game]  The number of squares in a chessboard or a checkerboard: 32 white and 32 black squares (or sometimes other 2 contrast colors) arranged in alternating pattern (or as checkered bard).

[Game]  The number of I-Ching symbols/markings (Chinese hexagrams). Each trigram combines of 6 piled lines, broken or unbroken, in similar pattern of the Pa-kua trigrams.

[Gov.]  The number of parishes in Louisiana, the only U.S. state that is administratively divided into parishes, instead of counties.

[Math.]  The largest 2-digit cube number = 43.

[Math.]  645 = 1,073,741,824 =  (10+7+3+7+4+1+8+24)5

646 = 68,719,476,736 = (6+8+7+1+9+4+7+6+7+3+6)6.

[Math.]  648,396,981 begins with the digits 8,396,981.

[Math.]  123,456 = 643´64´3.

[Math.]  23×64 = 1,472 = 32×46

23×96 = 2,208 = 32×69

64×69 = 4,416 = 96×46.

[Math.]  A power of 10 that can be represented as the product of 2 numbers, which have no digit 0: 106 = 1,000,000 = 26×56 = 64×15,625.

[Math.]   642 = 4096 = 4095+1

66342 = 44009956 = 44009955+1

666,3342 = 444,000,999,556 = 444,000,999,555+1.

...

[Measure]  The number of dry pints in a bushel.

U.S. customary units for dry measures: 1 bushel = 4 pecks = 32 dry quarts = 64 dry pints = 35.23907016688 liters = 2150.42 inch3.

British imperial units for dry and liquid measures: 1 bushel = 4 pecks = 8 gallons = 32 quarts = 64 pints = 256 gills = 1280 fluidounces = 36.368736 liters.

[Phone]  International telephone dialing code for New Zealand.

[Science]  Sedimentary units of rock:

The size of clay unit is less than 1/256 mm.

The size of silt unit is from 1/256 to 1/16 mm.

The size of very fine sand is from 1/16 to 1/8 mm.

The size of fine sand is from 1/8 to ¼ mm.

The size of medium sand is from ¼ to ½ mm.

The size of coarse sand is from ½ to 1 mm.

The size of very coarse sand is from 1 to 2 mm.

The size of granule is from 2 to 4 mm.

The size of pebble is from 4 to 64 mm.

The size of cobble is from 64 to 256 mm.

The size of boulder is greater than 256 mm.

[Tech.]  The “number system” code of an EAN-13 barcode for Finland’s products.

[Tech.]  The DES (Data Encryption Standard) algorithm uses 56-bit keys to encrypt/decrypt 64-bit plaintexts/ciphertexts in banking funds transfer security, since 1977 until late 1990s.

[Theology]  Saint Peter became the first Pope in 64 A.D., though he was not considered a Pope during his life.

[Trivia]  The height (inches) of the shortest U.S. President: James Madison. The tallest U.S. President: Abraham Lincoln: 76 inches.

64, 66, 67, 68 & 69

[Math.]

 66×64 = 4224 66×67 = 4422 66×68 = 4488 66×69 = 4554 66×74 = 4884

 666×661 = 440,226 666×666 = 443,556 666×669 = 445,554 666×672 = 447,552 666×663 = 441,558 666×667 = 444,222 666×670 = 446,220 666×674 = 448,884 666×664 = 442,224 666×668 = 444,888 666×671 = 446,886 666×675 = 449,550
… (generalizable pattern) …

[World]  The ISO country code for Bhutan is 064. (ISO-3166)

64.75...

[Measure]  1 grain = 64.75694mg (milligrams). (Grain troy or troy grain).

Units for precious metals weight measures: 1 troy pound = 12 troy ounces = 240 pennyweights = 5760 grains = 373 g (grams).

64.79...

[Measure]  British imperial units for weight measures: 1 stone = 14 lb (pounds) = 224 oz (ounces) = 3584 drams = 98,000 grains = 6350.29318 g (grams) & 1 grain = 64.79891 mg (milligrams) & 1 ounce = 16 drams = 437.5 grains & 1 dram = 2711/32 grains...