166456123 has 2 divisors, whose sum is σ = 166456124. Its totient is φ = 166456122.

The previous prime is 166456117. The next prime is 166456159. The reversal of 166456123 is 321654661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166456123 is a prime.

It is a super-2 number, since 2×166456123² = 55415281768382258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166456183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83228061 + 83228062.

It is an arithmetic number, because the mean of its divisors is an integer number (83228062).

Almost surely, 2^166456123 is an apocalyptic number.

166456123 is a deficient number, since it is larger than the sum of its proper divisors (1).

166456123 is an equidigital number, since it uses as much as digits as its factorization.

166456123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 166456123 is about 12901.7875893227. The cubic root of 166456123 is about 550.0893772106.

The spelling of 166456123 in words is "one hundred sixty-six million, four hundred fifty-six thousand, one hundred twenty-three".