679959880 has 64 divisors (see below), whose sum is σ = 1623648240. Its totient is φ = 255393792.

The previous prime is 679959827. The next prime is 679959901. The reversal of 679959880 is 88959976.

It can be written as a sum of positive squares in 8 ways, for example, as 583802244 + 96157636 = 24162^2 + 9806^2 .

It is a super-2 number, since 2×679959880² = 924690876819228800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391494 + ... + 393226.

Almost surely, 2^679959880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679959880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811824120).

679959880 is an abundant number, since it is smaller than the sum of its proper divisors (943688360).

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

679959880 is a wasteful number, since it uses less digits than its factorization.

679959880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338 (or 2334 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 61.

The square root of 679959880 is about 26076.0403435798. The cubic root of 679959880 is about 879.3486398948.

The spelling of 679959880 in words is "six hundred seventy-nine million, nine hundred fifty-nine thousand, eight hundred eighty".