656056665665 has 32 divisors (see below), whose sum is σ = 822995582976. Its totient is φ = 501111230400.

The previous prime is 656056665661. The next prime is 656056665697. The reversal of 656056665665 is 566566650656.

It is not a de Polignac number, because 656056665665 - 2² = 656056665661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656056665598 and 656056665607.

It is not an unprimeable number, because it can be changed into a prime (656056665661) 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, 207414374 + ... + 207417536.

It is an arithmetic number, because the mean of its divisors is an integer number (25718611968).

Almost surely, 2^656056665665 is an apocalyptic number.

It is an amenable number.

656056665665 is a deficient number, since it is larger than the sum of its proper divisors (166938917311).

656056665665 is a wasteful number, since it uses less digits than its factorization.

656056665665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5909.

The product of its (nonzero) digits is 174960000, while the sum is 62.

The spelling of 656056665665 in words is "six hundred fifty-six billion, fifty-six million, six hundred sixty-five thousand, six hundred sixty-five".