656343660 has 96 divisors (see below), whose sum is σ = 2172764160. Its totient is φ = 144845568.

The previous prime is 656343641. The next prime is 656343661. The reversal of 656343660 is 66343656.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (656343661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14764 + ... + 39123.

It is an arithmetic number, because the mean of its divisors is an integer number (22632960).

Almost surely, 2^656343660 is an apocalyptic number.

656343660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656343660 is an abundant number, since it is smaller than the sum of its proper divisors (1516420500).

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

656343660 is a wasteful number, since it uses less digits than its factorization.

656343660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53935 (or 53933 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 39.

The square root of 656343660 is about 25619.2049056953. The cubic root of 656343660 is about 869.0480007986.

The spelling of 656343660 in words is "six hundred fifty-six million, three hundred forty-three thousand, six hundred sixty".