166502905164 has 36 divisors (see below), whose sum is σ = 423018820224. Its totient is φ = 55219235232.

The previous prime is 166502905139. The next prime is 166502905171. The reversal of 166502905164 is 461509205661.

166502905164 is a `hidden beast` number, since 1 + 6 + 6 + 502 + 90 + 51 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 11731692 + ... + 11745875.

It is an arithmetic number, because the mean of its divisors is an integer number (11750522784).

Almost surely, 2^166502905164 is an apocalyptic number.

It is an amenable number.

166502905164 is an abundant number, since it is smaller than the sum of its proper divisors (256515915060).

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

166502905164 is a wasteful number, since it uses less digits than its factorization.

166502905164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23477774 (or 23477769 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 166502905164 in words is "one hundred sixty-six billion, five hundred two million, nine hundred five thousand, one hundred sixty-four".