166616164 has 24 divisors (see below), whose sum is σ = 342554688. Its totient is φ = 69908640.

The previous prime is 166616161. The next prime is 166616207. The reversal of 166616164 is 461616661.

It is a super-2 number, since 2×166616164² = 55521892212149792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (166616161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145072 + ... + 146215.

It is an arithmetic number, because the mean of its divisors is an integer number (14273112).

Almost surely, 2^166616164 is an apocalyptic number.

It is an amenable number.

166616164 is an abundant number, since it is smaller than the sum of its proper divisors (175938524).

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

166616164 is a wasteful number, since it uses less digits than its factorization.

166616164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291315 (or 291313 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 166616164 is about 12907.9883792944. The cubic root of 166616164 is about 550.2656171567.

It can be divided in two parts, 1666161 and 64, that added together give a triangular number (1666225 = T₁₈₂₅).

The spelling of 166616164 in words is "one hundred sixty-six million, six hundred sixteen thousand, one hundred sixty-four".