166525171 has 2 divisors, whose sum is σ = 166525172. Its totient is φ = 166525170.

The previous prime is 166525153. The next prime is 166525207. The reversal of 166525171 is 171525661.

It is a weak prime.

It is an emirp because it is prime and its reverse (171525661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166525171 - 2⁷ = 166525043 is a prime.

It is not a weakly prime, because it can be changed into another prime (166525571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83262585 + 83262586.

It is an arithmetic number, because the mean of its divisors is an integer number (83262586).

Almost surely, 2^166525171 is an apocalyptic number.

166525171 is a deficient number, since it is larger than the sum of its proper divisors (1).

166525171 is an equidigital number, since it uses as much as digits as its factorization.

166525171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 34.

The square root of 166525171 is about 12904.4632201421. The cubic root of 166525171 is about 550.1654279239.

The spelling of 166525171 in words is "one hundred sixty-six million, five hundred twenty-five thousand, one hundred seventy-one".