166860171 has 12 divisors (see below), whose sum is σ = 249331680. Its totient is φ = 107404080.

The previous prime is 166860131. The next prime is 166860179. The reversal of 166860171 is 171068661.

166860171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166860171 - 2⁹ = 166859659 is a prime.

It is a super-2 number, since 2×166860171² = 55684633332298482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166860179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319395 + ... + 319916.

It is an arithmetic number, because the mean of its divisors is an integer number (20777640).

Almost surely, 2^166860171 is an apocalyptic number.

166860171 is a deficient number, since it is larger than the sum of its proper divisors (82471509).

166860171 is a wasteful number, since it uses less digits than its factorization.

166860171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639346 (or 639343 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 166860171 is about 12917.4367039285. The cubic root of 166860171 is about 550.5341048545.

The spelling of 166860171 in words is "one hundred sixty-six million, eight hundred sixty thousand, one hundred seventy-one".