165995166 has 8 divisors (see below), whose sum is σ = 331990344. Its totient is φ = 55331720.

The previous prime is 165995147. The next prime is 165995197. The reversal of 165995166 is 661599561.

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

165995166 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13832925 + ... + 13832936.

It is an arithmetic number, because the mean of its divisors is an integer number (41498793).

Almost surely, 2^165995166 is an apocalyptic number.

165995166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

165995166 is a wasteful number, since it uses less digits than its factorization.

165995166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27665866.

The product of its digits is 437400, while the sum is 48.

The square root of 165995166 is about 12883.9111297773. The cubic root of 165995166 is about 549.5811312168.

The spelling of 165995166 in words is "one hundred sixty-five million, nine hundred ninety-five thousand, one hundred sixty-six".