166118423 has 2 divisors, whose sum is σ = 166118424. Its totient is φ = 166118422.

The previous prime is 166118389. The next prime is 166118431. The reversal of 166118423 is 324811661.

166118423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166118423 - 2²⁴ = 149341207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166118423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166178423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83059211 + 83059212.

It is an arithmetic number, because the mean of its divisors is an integer number (83059212).

Almost surely, 2^166118423 is an apocalyptic number.

166118423 is a deficient number, since it is larger than the sum of its proper divisors (1).

166118423 is an equidigital number, since it uses as much as digits as its factorization.

166118423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 166118423 is about 12888.6936110686. The cubic root of 166118423 is about 549.7171250607.

It can be divided in two parts, 1661 and 18423, that multiplied together give a palindrome (30600603).

The spelling of 166118423 in words is "one hundred sixty-six million, one hundred eighteen thousand, four hundred twenty-three".