166023934289 has 2 divisors, whose sum is σ = 166023934290. Its totient is φ = 166023934288.

The previous prime is 166023934253. The next prime is 166023934303. The reversal of 166023934289 is 982439320661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163268524225 + 2755410064 = 404065^2 + 52492^2 .

It is a cyclic number.

It is not a de Polignac number, because 166023934289 - 2⁸ = 166023934033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166023934289.

It is not a weakly prime, because it can be changed into another prime (166023934249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83011967144 + 83011967145.

It is an arithmetic number, because the mean of its divisors is an integer number (83011967145).

Almost surely, 2^166023934289 is an apocalyptic number.

It is an amenable number.

166023934289 is a deficient number, since it is larger than the sum of its proper divisors (1).

166023934289 is an equidigital number, since it uses as much as digits as its factorization.

166023934289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 166023934289 in words is "one hundred sixty-six billion, twenty-three million, nine hundred thirty-four thousand, two hundred eighty-nine".