166598058257 has 2 divisors, whose sum is σ = 166598058258. Its totient is φ = 166598058256.

The previous prime is 166598058233. The next prime is 166598058301. The reversal of 166598058257 is 752850895661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152755123921 + 13842934336 = 390839^2 + 117656^2 .

It is a cyclic number.

It is not a de Polignac number, because 166598058257 - 2²⁸ = 166329622801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166598058257.

It is not a weakly prime, because it can be changed into another prime (166598058157) 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, 83299029128 + 83299029129.

It is an arithmetic number, because the mean of its divisors is an integer number (83299029129).

Almost surely, 2^166598058257 is an apocalyptic number.

It is an amenable number.

166598058257 is a deficient number, since it is larger than the sum of its proper divisors (1).

166598058257 is an equidigital number, since it uses as much as digits as its factorization.

166598058257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288000, while the sum is 62.

The spelling of 166598058257 in words is "one hundred sixty-six billion, five hundred ninety-eight million, fifty-eight thousand, two hundred fifty-seven".