656424656 has 10 divisors (see below), whose sum is σ = 1271822802. Its totient is φ = 328212320.

The previous prime is 656424653. The next prime is 656424707.

It is a happy number.

656424656 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 582739600 + 73685056 = 24140^2 + 8584^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656424653) by changing a digit.

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 as a sum of consecutive naturals, namely, 20513255 + ... + 20513286.

Almost surely, 2^656424656 is an apocalyptic number.

It is an amenable number.

656424656 is a deficient number, since it is larger than the sum of its proper divisors (615398146).

656424656 is a wasteful number, since it uses less digits than its factorization.

656424656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41026549 (or 41026543 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 44.

The square root of 656424656 is about 25620.7856241763. The cubic root of 656424656 is about 869.0837475782.

The spelling of 656424656 in words is "six hundred fifty-six million, four hundred twenty-four thousand, six hundred fifty-six".