166493111 has 2 divisors, whose sum is σ = 166493112. Its totient is φ = 166493110.

The previous prime is 166493077. The next prime is 166493123. The reversal of 166493111 is 111394661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166493111 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166493141) 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, 83246555 + 83246556.

It is an arithmetic number, because the mean of its divisors is an integer number (83246556).

Almost surely, 2^166493111 is an apocalyptic number.

166493111 is a deficient number, since it is larger than the sum of its proper divisors (1).

166493111 is an equidigital number, since it uses as much as digits as its factorization.

166493111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 166493111 is about 12903.2209544749. The cubic root of 166493111 is about 550.1301190762.

The spelling of 166493111 in words is "one hundred sixty-six million, four hundred ninety-three thousand, one hundred eleven".