656747968 has 28 divisors (see below), whose sum is σ = 1306832032. Its totient is φ = 327467520.

The previous prime is 656747953. The next prime is 656748017. The reversal of 656747968 is 869747656.

It is a happy number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 9508 + ... + 37468.

Almost surely, 2^656747968 is an apocalyptic number.

It is an amenable number.

656747968 is a deficient number, since it is larger than the sum of its proper divisors (650084064).

656747968 is a wasteful number, since it uses less digits than its factorization.

656747968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28340 (or 28330 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 58.

The square root of 656747968 is about 25627.0944119695. The cubic root of 656747968 is about 869.2264088281.

The spelling of 656747968 in words is "six hundred fifty-six million, seven hundred forty-seven thousand, nine hundred sixty-eight".