166023416323573 has 2 divisors, whose sum is σ = 166023416323574. Its totient is φ = 166023416323572.

The previous prime is 166023416323571. The next prime is 166023416323651. The reversal of 166023416323573 is 375323614320661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107842554864529 + 58180861459044 = 10384727^2 + 7627638^2 .

It is a cyclic number.

It is not a de Polignac number, because 166023416323573 - 2¹ = 166023416323571 is a prime.

Together with 166023416323571, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 166023416323573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166023416323571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83011708161786 + 83011708161787.

It is an arithmetic number, because the mean of its divisors is an integer number (83011708161787).

Almost surely, 2^{166023416323573} is an apocalyptic number.

It is an amenable number.

166023416323573 is a deficient number, since it is larger than the sum of its proper divisors (1).

166023416323573 is an equidigital number, since it uses as much as digits as its factorization.

166023416323573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 52.

The spelling of 166023416323573 in words is "one hundred sixty-six trillion, twenty-three billion, four hundred sixteen million, three hundred twenty-three thousand, five hundred seventy-three".