166021564233059 has 2 divisors, whose sum is σ = 166021564233060. Its totient is φ = 166021564233058.

The previous prime is 166021564232983. The next prime is 166021564233061. The reversal of 166021564233059 is 950332465120661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166021564233059 - 2¹⁶ = 166021564167523 is a prime.

Together with 166021564233061, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166021564233059.

It is not a weakly prime, because it can be changed into another prime (166021564233659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83010782116529 + 83010782116530.

It is an arithmetic number, because the mean of its divisors is an integer number (83010782116530).

Almost surely, 2^{166021564233059} is an apocalyptic number.

166021564233059 is a deficient number, since it is larger than the sum of its proper divisors (1).

166021564233059 is an equidigital number, since it uses as much as digits as its factorization.

166021564233059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 166021564233059 in words is "one hundred sixty-six trillion, twenty-one billion, five hundred sixty-four million, two hundred thirty-three thousand, fifty-nine".