166021564232983 has 2 divisors, whose sum is σ = 166021564232984. Its totient is φ = 166021564232982.

The previous prime is 166021564232971. The next prime is 166021564233059. The reversal of 166021564232983 is 389232465120661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166021564232983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166021564232383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83010782116491 + 83010782116492.

It is an arithmetic number, because the mean of its divisors is an integer number (83010782116492).

Almost surely, 2^{166021564232983} is an apocalyptic number.

166021564232983 is a deficient number, since it is larger than the sum of its proper divisors (1).

166021564232983 is an equidigital number, since it uses as much as digits as its factorization.

166021564232983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22394880, while the sum is 58.

The spelling of 166021564232983 in words is "one hundred sixty-six trillion, twenty-one billion, five hundred sixty-four million, two hundred thirty-two thousand, nine hundred eighty-three".