679881756 has 24 divisors (see below), whose sum is σ = 1588253184. Its totient is φ = 226361200.

The previous prime is 679881691. The next prime is 679881757. The reversal of 679881756 is 657188976.

It is a junction number, because it is equal to n+sod(n) for n = 679881696 and 679881705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679881757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22470 + ... + 43181.

It is an arithmetic number, because the mean of its divisors is an integer number (66177216).

Almost surely, 2^679881756 is an apocalyptic number.

It is an amenable number.

679881756 is an abundant number, since it is smaller than the sum of its proper divisors (908371428).

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

679881756 is a wasteful number, since it uses less digits than its factorization.

679881756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66521 (or 66519 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 57.

The square root of 679881756 is about 26074.5422970375. The cubic root of 679881756 is about 879.3149610135.

The spelling of 679881756 in words is "six hundred seventy-nine million, eight hundred eighty-one thousand, seven hundred fifty-six".