166625393 has 16 divisors (see below), whose sum is σ = 188390016. Its totient is φ = 146039040.

The previous prime is 166625369. The next prime is 166625401. The reversal of 166625393 is 393526661.

It is a cyclic number.

It is not a de Polignac number, because 166625393 - 2²⁴ = 149848177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166625393.

It is not an unprimeable number, because it can be changed into a prime (166627393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44180 + ... + 47802.

It is an arithmetic number, because the mean of its divisors is an integer number (11774376).

Almost surely, 2^166625393 is an apocalyptic number.

It is an amenable number.

166625393 is a deficient number, since it is larger than the sum of its proper divisors (21764623).

166625393 is a wasteful number, since it uses less digits than its factorization.

166625393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784.

The product of its digits is 174960, while the sum is 41.

The square root of 166625393 is about 12908.3458661441. The cubic root of 166625393 is about 550.2757768505.

The spelling of 166625393 in words is "one hundred sixty-six million, six hundred twenty-five thousand, three hundred ninety-three".