656500665051 has 72 divisors (see below), whose sum is σ = 1191706693632. Its totient is φ = 340901748000.

The previous prime is 656500665047. The next prime is 656500665167. The reversal of 656500665051 is 150566005656.

It is not a de Polignac number, because 656500665051 - 2² = 656500665047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 656500664988 and 656500665006.

It is not an unprimeable number, because it can be changed into a prime (656500665011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 20466976 + ... + 20499026.

It is an arithmetic number, because the mean of its divisors is an integer number (16551481856).

Almost surely, 2^656500665051 is an apocalyptic number.

656500665051 is a deficient number, since it is larger than the sum of its proper divisors (535206028581).

656500665051 is a wasteful number, since it uses less digits than its factorization.

656500665051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34773 (or 34759 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 656500665051 in words is "six hundred fifty-six billion, five hundred million, six hundred sixty-five thousand, fifty-one".