656928660 has 24 divisors (see below), whose sum is σ = 1839400416. Its totient is φ = 175180960.

The previous prime is 656928617. The next prime is 656928683. The reversal of 656928660 is 66829656.

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, 5474346 + ... + 5474465.

It is an arithmetic number, because the mean of its divisors is an integer number (76641684).

Almost surely, 2^656928660 is an apocalyptic number.

656928660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656928660 is an abundant number, since it is smaller than the sum of its proper divisors (1182471756).

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

656928660 is a wasteful number, since it uses less digits than its factorization.

656928660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10948823 (or 10948821 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 656928660 is about 25630.6195789333. The cubic root of 656928660 is about 869.3061186832.

The spelling of 656928660 in words is "six hundred fifty-six million, nine hundred twenty-eight thousand, six hundred sixty".