166625075 has 12 divisors (see below), whose sum is σ = 218769480. Its totient is φ = 125458560.

The previous prime is 166625071. The next prime is 166625077. The reversal of 166625075 is 570526661.

It is not a de Polignac number, because 166625075 - 2² = 166625071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166625071) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 195605 + ... + 196454.

It is an arithmetic number, because the mean of its divisors is an integer number (18230790).

Almost surely, 2^166625075 is an apocalyptic number.

166625075 is a deficient number, since it is larger than the sum of its proper divisors (52144405).

166625075 is a wasteful number, since it uses less digits than its factorization.

166625075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392086 (or 392081 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 166625075 is about 12908.3335485259. Note that the first 3 decimals coincide. The cubic root of 166625075 is about 550.2754267881.

The spelling of 166625075 in words is "one hundred sixty-six million, six hundred twenty-five thousand, seventy-five".