166522513 has 2 divisors, whose sum is σ = 166522514. Its totient is φ = 166522512.

The previous prime is 166522511. The next prime is 166522529. The reversal of 166522513 is 315225661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147573904 + 18948609 = 12148^2 + 4353^2 .

It is a cyclic number.

It is not a de Polignac number, because 166522513 - 2¹ = 166522511 is a prime.

Together with 166522511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (166522511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83261256 + 83261257.

It is an arithmetic number, because the mean of its divisors is an integer number (83261257).

Almost surely, 2^166522513 is an apocalyptic number.

It is an amenable number.

166522513 is a deficient number, since it is larger than the sum of its proper divisors (1).

166522513 is an equidigital number, since it uses as much as digits as its factorization.

166522513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 166522513 is about 12904.3602321076. The cubic root of 166522513 is about 550.1625007438.

The spelling of 166522513 in words is "one hundred sixty-six million, five hundred twenty-two thousand, five hundred thirteen".