166125165 has 16 divisors (see below), whose sum is σ = 266131008. Its totient is φ = 88489856.

The previous prime is 166125163. The next prime is 166125181. The reversal of 166125165 is 561521661.

It is a cyclic number.

It is not a de Polignac number, because 166125165 - 2¹ = 166125163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166125163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6394 + ... + 19316.

It is an arithmetic number, because the mean of its divisors is an integer number (16633188).

Almost surely, 2^166125165 is an apocalyptic number.

166125165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166125165 is a deficient number, since it is larger than the sum of its proper divisors (100005843).

166125165 is a wasteful number, since it uses less digits than its factorization.

166125165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13788.

The product of its digits is 10800, while the sum is 33.

The square root of 166125165 is about 12888.9551554810. The cubic root of 166125165 is about 549.7245618090.

The spelling of 166125165 in words is "one hundred sixty-six million, one hundred twenty-five thousand, one hundred sixty-five".