656909656 has 32 divisors (see below), whose sum is σ = 1339606800. Its totient is φ = 300182400.

The previous prime is 656909633. The next prime is 656909677.

It is a happy number.

656909656 is nontrivially palindromic in base 10.

656909656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×656909656² = 863060592292076672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

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, 20766 + ... + 41773.

Almost surely, 2^656909656 is an apocalyptic number.

It is an amenable number.

656909656 is an abundant number, since it is smaller than the sum of its proper divisors (682697144).

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

656909656 is a wasteful number, since it uses less digits than its factorization.

656909656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62659 (or 62655 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 52.

The square root of 656909656 is about 25630.2488477970. The cubic root of 656909656 is about 869.2977360111.

The spelling of 656909656 in words is "six hundred fifty-six million, nine hundred nine thousand, six hundred fifty-six".