656660605616 has 40 divisors (see below), whose sum is σ = 1349538757920. Its totient is φ = 308461896704.

The previous prime is 656660605603. The next prime is 656660605619. The reversal of 656660605616 is 616506066656.

It is not an unprimeable number, because it can be changed into a prime (656660605619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2015636 + ... + 2318643.

It is an arithmetic number, because the mean of its divisors is an integer number (33738468948).

Almost surely, 2^656660605616 is an apocalyptic number.

It is an amenable number.

656660605616 is an abundant number, since it is smaller than the sum of its proper divisors (692878152304).

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

656660605616 is a wasteful number, since it uses less digits than its factorization.

656660605616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334861 (or 4334855 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 656660605616 in words is "six hundred fifty-six billion, six hundred sixty million, six hundred five thousand, six hundred sixteen".