166560872 has 16 divisors (see below), whose sum is σ = 312526500. Its totient is φ = 83220480.

The previous prime is 166560869. The next prime is 166560893. The reversal of 166560872 is 278065661.

It can be written as a sum of positive squares in 2 ways, for example, as 153412996 + 13147876 = 12386^2 + 3626^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5672 + ... + 19112.

Almost surely, 2^166560872 is an apocalyptic number.

It is an amenable number.

166560872 is a deficient number, since it is larger than the sum of its proper divisors (145965628).

166560872 is a wasteful number, since it uses less digits than its factorization.

166560872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14996 (or 14992 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 166560872 is about 12905.8464271043. The cubic root of 166560872 is about 550.2047414050.

The spelling of 166560872 in words is "one hundred sixty-six million, five hundred sixty thousand, eight hundred seventy-two".