166254165 has 48 divisors (see below), whose sum is σ = 359289216. Its totient is φ = 69091200.

The previous prime is 166254131. The next prime is 166254191. The reversal of 166254165 is 561452661.

166254165 is a `hidden beast` number, since 16 + 625 + 4 + 16 + 5 = 666.

It is not a de Polignac number, because 166254165 - 2⁹ = 166253653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20526 + ... + 27455.

It is an arithmetic number, because the mean of its divisors is an integer number (7485192).

Almost surely, 2^166254165 is an apocalyptic number.

166254165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166254165 is an abundant number, since it is smaller than the sum of its proper divisors (193035051).

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

166254165 is a wasteful number, since it uses less digits than its factorization.

166254165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48010 (or 48007 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 166254165 is about 12893.9584689885. The cubic root of 166254165 is about 549.8668162367.

The spelling of 166254165 in words is "one hundred sixty-six million, two hundred fifty-four thousand, one hundred sixty-five".