165660105666 has 64 divisors (see below), whose sum is σ = 386490807936. Its totient is φ = 46779264000.

The previous prime is 165660105643. The next prime is 165660105733. The reversal of 165660105666 is 666501066561.

165660105666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 617605 + ... + 844248.

It is an arithmetic number, because the mean of its divisors is an integer number (6038918874).

Almost surely, 2^165660105666 is an apocalyptic number.

165660105666 is an abundant number, since it is smaller than the sum of its proper divisors (220830702270).

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

165660105666 is a wasteful number, since it uses less digits than its factorization.

165660105666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461987.

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

The spelling of 165660105666 in words is "one hundred sixty-five billion, six hundred sixty million, one hundred five thousand, six hundred sixty-six".