166021564202983 has 2 divisors, whose sum is σ = 166021564202984. Its totient is φ = 166021564202982.

The previous prime is 166021564202957. The next prime is 166021564203017. The reversal of 166021564202983 is 389202465120661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166021564202983 - 2²¹ = 166021562105831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166021564232983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83010782101491 + 83010782101492.

It is an arithmetic number, because the mean of its divisors is an integer number (83010782101492).

Almost surely, 2^{166021564202983} is an apocalyptic number.

166021564202983 is a deficient number, since it is larger than the sum of its proper divisors (1).

166021564202983 is an equidigital number, since it uses as much as digits as its factorization.

166021564202983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 166021564202983 in words is "one hundred sixty-six trillion, twenty-one billion, five hundred sixty-four million, two hundred two thousand, nine hundred eighty-three".