166392257 has 2 divisors, whose sum is σ = 166392258. Its totient is φ = 166392256.

The previous prime is 166392223. The next prime is 166392269. The reversal of 166392257 is 752293661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88529281 + 77862976 = 9409^2 + 8824^2 .

It is a cyclic number.

It is not a de Polignac number, because 166392257 - 2⁸ = 166392001 is a prime.

It is not a weakly prime, because it can be changed into another prime (166392217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83196128 + 83196129.

It is an arithmetic number, because the mean of its divisors is an integer number (83196129).

Almost surely, 2^166392257 is an apocalyptic number.

It is an amenable number.

166392257 is a deficient number, since it is larger than the sum of its proper divisors (1).

166392257 is an equidigital number, since it uses as much as digits as its factorization.

166392257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 166392257 is about 12899.3122684894. The cubic root of 166392257 is about 550.0190153205.

The spelling of 166392257 in words is "one hundred sixty-six million, three hundred ninety-two thousand, two hundred fifty-seven".