166172495 has 8 divisors (see below), whose sum is σ = 203649984. Its totient is φ = 130109344.

The previous prime is 166172491. The next prime is 166172519. The reversal of 166172495 is 594271661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166172495 - 2² = 166172491 is a prime.

It is a super-2 number, since 2×166172495² = 55226596189050050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166172491) 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, 353324 + ... + 353793.

It is an arithmetic number, because the mean of its divisors is an integer number (25456248).

Almost surely, 2^166172495 is an apocalyptic number.

166172495 is a deficient number, since it is larger than the sum of its proper divisors (37477489).

166172495 is an equidigital number, since it uses as much as digits as its factorization.

166172495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707169.

The product of its digits is 90720, while the sum is 41.

The square root of 166172495 is about 12890.7910928694. The cubic root of 166172495 is about 549.7767633984.

The spelling of 166172495 in words is "one hundred sixty-six million, one hundred seventy-two thousand, four hundred ninety-five".