16156506666 has 16 divisors (see below), whose sum is σ = 32414950944. Its totient is φ = 5368512624.

The previous prime is 16156506643. The next prime is 16156506671. The reversal of 16156506666 is 66660565161.

It is a super-2 number, since 2×16156506666² (a number of 21 digits) contains 22 as substring.

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, 4245340 + ... + 4249143.

It is an arithmetic number, because the mean of its divisors is an integer number (2025934434).

Almost surely, 2^16156506666 is an apocalyptic number.

16156506666 is an abundant number, since it is smaller than the sum of its proper divisors (16258444278).

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

16156506666 is a wasteful number, since it uses less digits than its factorization.

16156506666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8494805.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 16156506666 in words is "sixteen billion, one hundred fifty-six million, five hundred six thousand, six hundred sixty-six".