166318326539 has 2 divisors, whose sum is σ = 166318326540. Its totient is φ = 166318326538.

The previous prime is 166318326353. The next prime is 166318326569. The reversal of 166318326539 is 935623813661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166318326539 - 2⁸ = 166318326283 is a prime.

It is not a weakly prime, because it can be changed into another prime (166318326569) 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, 83159163269 + 83159163270.

It is an arithmetic number, because the mean of its divisors is an integer number (83159163270).

Almost surely, 2^166318326539 is an apocalyptic number.

166318326539 is a deficient number, since it is larger than the sum of its proper divisors (1).

166318326539 is an equidigital number, since it uses as much as digits as its factorization.

166318326539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 53.

The spelling of 166318326539 in words is "one hundred sixty-six billion, three hundred eighteen million, three hundred twenty-six thousand, five hundred thirty-nine".