3156564612666 has 16 divisors (see below), whose sum is σ = 6645399184800. Its totient is φ = 996809877648.

The previous prime is 3156564612637. The next prime is 3156564612703. The reversal of 3156564612666 is 6662164656513.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13844581521 + ... + 13844581748.

It is an arithmetic number, because the mean of its divisors is an integer number (415337449050).

Almost surely, 2^{3156564612666} is an apocalyptic number.

3156564612666 is an abundant number, since it is smaller than the sum of its proper divisors (3488834572134).

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

3156564612666 is a wasteful number, since it uses less digits than its factorization.

3156564612666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27689163293.

The product of its digits is 27993600, while the sum is 57.

The spelling of 3156564612666 in words is "three trillion, one hundred fifty-six billion, five hundred sixty-four million, six hundred twelve thousand, six hundred sixty-six".