Numbers 77,000,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

70,000,000 71,000,00072,000,00073,000,000 – 74,000,000

75,000,00076,000,00077,000,00078,000,00079,000,000

All Numbers  & [1M] & [10M- [20M] - [30M] - [40M] - [50M] - [60M] - [70M] - [80M] - [90M]  &  [100M]

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77,053,284

[Math.]  Sum of the first 132 cube numbers:

13+23+…+1313+1323 = 77,053,284 = (1+2+…+131+132)2 = 87782.

 

77,111,777 & 77,222,777 & 77,333,777

[Math.]  All numbers 77,111,777 & 77,222,777 & 77,333,777 are prime.

 

77,237,792

[Math.]  A pair of amicable numbers (75171808, 77237792).

 

xy,abc,def

[Math.]  For any xy = 10 to 99, there are always six 6-digit numbers abc,edf such that the sum (xy+abc,def) is equal to one of 6 digit-rotations of 142,857 and the number xy,abc,def is a multiple of 142,857.

 

For any xy = 10 to 99, there are always twelve 6-digit numbers abc,edf such that the sum (xy+abc,def) is equal to one of 12 digit-rotations of 076,923 or 153,846 and the number xy,abc,def is a multiple of 76,923.