656016571667 has 16 divisors (see below), whose sum is σ = 685795118400. Its totient is φ = 627011827200.

The previous prime is 656016571643. The next prime is 656016571703. The reversal of 656016571667 is 766175610656.

It is a cyclic number.

It is not a de Polignac number, because 656016571667 - 2¹⁸ = 656016309523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656016571367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289559 + ... + 1181472.

It is an arithmetic number, because the mean of its divisors is an integer number (42862194900).

Almost surely, 2^656016571667 is an apocalyptic number.

656016571667 is a deficient number, since it is larger than the sum of its proper divisors (29778546733).

656016571667 is a wasteful number, since it uses less digits than its factorization.

656016571667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471294.

The product of its (nonzero) digits is 9525600, while the sum is 56.

The spelling of 656016571667 in words is "six hundred fifty-six billion, sixteen million, five hundred seventy-one thousand, six hundred sixty-seven".