166264613 has 2 divisors, whose sum is σ = 166264614. Its totient is φ = 166264612.

The previous prime is 166264601. The next prime is 166264619. The reversal of 166264613 is 316462661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165431044 + 833569 = 12862^2 + 913^2 .

It is a cyclic number.

It is not a de Polignac number, because 166264613 - 2¹⁰ = 166263589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166264619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83132306 + 83132307.

It is an arithmetic number, because the mean of its divisors is an integer number (83132307).

Almost surely, 2^166264613 is an apocalyptic number.

It is an amenable number.

166264613 is a deficient number, since it is larger than the sum of its proper divisors (1).

166264613 is an equidigital number, since it uses as much as digits as its factorization.

166264613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 166264613 is about 12894.3636136104. The cubic root of 166264613 is about 549.8783345209.

The spelling of 166264613 in words is "one hundred sixty-six million, two hundred sixty-four thousand, six hundred thirteen".