656606320 has 20 divisors (see below), whose sum is σ = 1526609880. Its totient is φ = 262642496.

The previous prime is 656606303. The next prime is 656606359. The reversal of 656606320 is 23606656.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×656606320² = 862263718927884800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4103710 + ... + 4103869.

It is an arithmetic number, because the mean of its divisors is an integer number (76330494).

Almost surely, 2^656606320 is an apocalyptic number.

It is an amenable number.

656606320 is an abundant number, since it is smaller than the sum of its proper divisors (870003560).

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

656606320 is a wasteful number, since it uses less digits than its factorization.

656606320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8207592 (or 8207586 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 656606320 is about 25624.3306254037. The cubic root of 656606320 is about 869.1639124869.

The spelling of 656606320 in words is "six hundred fifty-six million, six hundred six thousand, three hundred twenty".