166564122 has 16 divisors (see below), whose sum is σ = 333387360. Its totient is φ = 55478192.

The previous prime is 166564103. The next prime is 166564141. The reversal of 166564122 is 221465661.

166564122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166564103) and next prime (166564141).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 1872 + ... + 18347.

It is an arithmetic number, because the mean of its divisors is an integer number (20836710).

Almost surely, 2^166564122 is an apocalyptic number.

166564122 is an abundant number, since it is smaller than the sum of its proper divisors (166823238).

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

166564122 is a wasteful number, since it uses less digits than its factorization.

166564122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21597.

The product of its digits is 17280, while the sum is 33.

The square root of 166564122 is about 12905.9723384176. The cubic root of 166564122 is about 550.2083199841.

The spelling of 166564122 in words is "one hundred sixty-six million, five hundred sixty-four thousand, one hundred twenty-two".