656656656 has 40 divisors (see below), whose sum is σ = 1737742944. Its totient is φ = 213546240.

The previous prime is 656656633. The next prime is 656656691.

It is a happy number.

656656656 is nontrivially palindromic in base 10.

656656656 is a modest number, since divided by 656656 gives 656 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 656656599 and 656656608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164866 + ... + 168801.

Almost surely, 2^656656656 is an apocalyptic number.

It is an amenable number.

656656656 is an abundant number, since it is smaller than the sum of its proper divisors (1081086288).

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

656656656 is a wasteful number, since it uses less digits than its factorization.

656656656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333719 (or 333713 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 51.

The square root of 656656656 is about 25625.3127980909. The cubic root of 656656656 is about 869.1861222014.

The spelling of 656656656 in words is "six hundred fifty-six million, six hundred fifty-six thousand, six hundred fifty-six".