679680866502 has 64 divisors (see below), whose sum is σ = 1700863211520. Its totient is φ = 199319896800.

The previous prime is 679680866479. The next prime is 679680866503. The reversal of 679680866502 is 205668086976.

679680866502 is a `hidden beast` number, since 6 + 7 + 9 + 68 + 0 + 8 + 66 + 502 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 679680866502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679680866503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18437133 + ... + 18473960.

It is an arithmetic number, because the mean of its divisors is an integer number (26575987680).

Almost surely, 2^679680866502 is an apocalyptic number.

679680866502 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

679680866502 is an abundant number, since it is smaller than the sum of its proper divisors (1021182345018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679680866502 is a wasteful number, since it uses less digits than its factorization.

679680866502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36911146 (or 36911140 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 679680866502 in words is "six hundred seventy-nine billion, six hundred eighty million, eight hundred sixty-six thousand, five hundred two".