166170131 has 2 divisors, whose sum is σ = 166170132. Its totient is φ = 166170130.

The previous prime is 166170113. The next prime is 166170157. The reversal of 166170131 is 131071661.

Together with previous prime (166170113) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (166170157) can be obtained adding 166170131 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166170131 - 2²⁶ = 99061267 is a prime.

It is a super-2 number, since 2×166170131² = 55225024873114322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166170131.

It is not a weakly prime, because it can be changed into another prime (166170931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83085065 + 83085066.

It is an arithmetic number, because the mean of its divisors is an integer number (83085066).

Almost surely, 2^166170131 is an apocalyptic number.

166170131 is a deficient number, since it is larger than the sum of its proper divisors (1).

166170131 is an equidigital number, since it uses as much as digits as its factorization.

166170131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 166170131 is about 12890.6993991792. The cubic root of 166170131 is about 549.7741563115.

The spelling of 166170131 in words is "one hundred sixty-six million, one hundred seventy thousand, one hundred thirty-one".