166156165 has 16 divisors (see below), whose sum is σ = 228563712. Its totient is φ = 113589504.

The previous prime is 166156157. The next prime is 166156183. The reversal of 166156165 is 561651661.

It is not a de Polignac number, because 166156165 - 2³ = 166156157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4752 + ... + 18838.

It is an arithmetic number, because the mean of its divisors is an integer number (14285232).

Almost surely, 2^166156165 is an apocalyptic number.

It is an amenable number.

166156165 is a deficient number, since it is larger than the sum of its proper divisors (62407547).

166156165 is a wasteful number, since it uses less digits than its factorization.

166156165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14436.

The product of its digits is 32400, while the sum is 37.

The square root of 166156165 is about 12890.1576794080. The cubic root of 166156165 is about 549.7587537018.

The spelling of 166156165 in words is "one hundred sixty-six million, one hundred fifty-six thousand, one hundred sixty-five".