166685166 has 12 divisors (see below), whose sum is σ = 361151232. Its totient is φ = 55561716.

The previous prime is 166685143. The next prime is 166685177. The reversal of 166685166 is 661586661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4630126 + ... + 4630161.

It is an arithmetic number, because the mean of its divisors is an integer number (30095936).

Almost surely, 2^166685166 is an apocalyptic number.

166685166 is an abundant number, since it is smaller than the sum of its proper divisors (194466066).

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

166685166 is a wasteful number, since it uses less digits than its factorization.

166685166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9260295 (or 9260292 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 166685166 is about 12910.6609435768. The cubic root of 166685166 is about 550.3415685468.

The spelling of 166685166 in words is "one hundred sixty-six million, six hundred eighty-five thousand, one hundred sixty-six".