166170291 has 16 divisors (see below), whose sum is σ = 268107264. Its totient is φ = 89368704.

The previous prime is 166170281. The next prime is 166170337. The reversal of 166170291 is 192071661.

It is not a de Polignac number, because 166170291 - 2⁷ = 166170163 is a prime.

It is a super-2 number, since 2×166170291² = 55225131222049362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166170281) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 232375 + ... + 233088.

It is an arithmetic number, because the mean of its divisors is an integer number (16756704).

Almost surely, 2^166170291 is an apocalyptic number.

166170291 is a deficient number, since it is larger than the sum of its proper divisors (101936973).

166170291 is a wasteful number, since it uses less digits than its factorization.

166170291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465490.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 166170291 is about 12890.7056052025. The cubic root of 166170291 is about 549.7743327648.

The spelling of 166170291 in words is "one hundred sixty-six million, one hundred seventy thousand, two hundred ninety-one".