166465657 has 2 divisors, whose sum is σ = 166465658. Its totient is φ = 166465656.

The previous prime is 166465603. The next prime is 166465661. The reversal of 166465657 is 756564661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163353961 + 3111696 = 12781^2 + 1764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166465657 is a prime.

It is not a weakly prime, because it can be changed into another prime (166465457) 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 as a sum of consecutive naturals, namely, 83232828 + 83232829.

It is an arithmetic number, because the mean of its divisors is an integer number (83232829).

Almost surely, 2^166465657 is an apocalyptic number.

It is an amenable number.

166465657 is a deficient number, since it is larger than the sum of its proper divisors (1).

166465657 is an equidigital number, since it uses as much as digits as its factorization.

166465657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 46.

The square root of 166465657 is about 12902.1570677155. The cubic root of 166465657 is about 550.0998793816.

The spelling of 166465657 in words is "one hundred sixty-six million, four hundred sixty-five thousand, six hundred fifty-seven".