166164056999 has 2 divisors, whose sum is σ = 166164057000. Its totient is φ = 166164056998.

The previous prime is 166164056953. The next prime is 166164057013. The reversal of 166164056999 is 999650461661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166164056999 - 2²⁸ = 165895621543 is a prime.

It is a super-2 number, since 2×166164056999² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166164056099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83082028499 + 83082028500.

It is an arithmetic number, because the mean of its divisors is an integer number (83082028500).

Almost surely, 2^166164056999 is an apocalyptic number.

166164056999 is a deficient number, since it is larger than the sum of its proper divisors (1).

166164056999 is an equidigital number, since it uses as much as digits as its factorization.

166164056999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18895680, while the sum is 62.

The spelling of 166164056999 in words is "one hundred sixty-six billion, one hundred sixty-four million, fifty-six thousand, nine hundred ninety-nine".