166219700923 has 2 divisors, whose sum is σ = 166219700924. Its totient is φ = 166219700922.

The previous prime is 166219700897. The next prime is 166219700951. The reversal of 166219700923 is 329007912661.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (329007912661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166219700923 is a prime.

It is not a weakly prime, because it can be changed into another prime (166219700323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83109850461 + 83109850462.

It is an arithmetic number, because the mean of its divisors is an integer number (83109850462).

Almost surely, 2^166219700923 is an apocalyptic number.

166219700923 is a deficient number, since it is larger than the sum of its proper divisors (1).

166219700923 is an equidigital number, since it uses as much as digits as its factorization.

166219700923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 166219700923 in words is "one hundred sixty-six billion, two hundred nineteen million, seven hundred thousand, nine hundred twenty-three".