Numbers 7,000,000,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

7,100,000,0007,200,000,0007,300,000,0007,400,000,000

7,500,000,0007,600,000,0007,700,000,0007,800,000,000 – 7,900,000,000

[1B] – [2B] – [3B] – [4B] – [5B] – [6B] – [7B] – [8B]  – [9B& [10B]

1  - 10 - 100  - 1000 - 10,000 - 100,000 - 1M - 10M - 100M1B10B - 100B - 1T - 10T - 100T - 1Q ...

7,029,984,025

[Math.]   Sum of the first 409 cube numbers:

13+…+4093 = 7,029,984,025 = (1+2+…+409)2 = 83,8452.

7,042,398,561

[Math.]   839192 = 7,042,398,561, a square number using each of 10 digits 0-9 once. (The 63rd of 87 such numbers).

7,098,905,025

[Math.]   Sum of the first 410 cube numbers:

13+…+4103 = 7,098,905,025 = (1+2+…+410)2 = 84,2552.

x,yzw,abc,def

[Math.]  For any x,yzw = 1000 to 9999, there are always six 6-digit numbers abc,edf such that x,yzw +abc,def is equal to one of 6 digit-rotations of 142,857 and the number x,yzw,abc,def is a multiple of 142,857.

For any x,yzw = 1000 to 9999, there are always twelve 6-digit numbers abc,edf such that x,yzw +abc,def is equal to one of 12 digit-rotations of 076,923 or 153,846 and the number x,yzw,abc,def is a multiple of 76,923.