166904149 has 2 divisors, whose sum is σ = 166904150. Its totient is φ = 166904148.

The previous prime is 166904141. The next prime is 166904159. The reversal of 166904149 is 941409661.

166904149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151733124 + 15171025 = 12318^2 + 3895^2 .

It is a cyclic number.

It is not a de Polignac number, because 166904149 - 2³ = 166904141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166904141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83452074 + 83452075.

It is an arithmetic number, because the mean of its divisors is an integer number (83452075).

Almost surely, 2^166904149 is an apocalyptic number.

It is an amenable number.

166904149 is a deficient number, since it is larger than the sum of its proper divisors (1).

166904149 is an equidigital number, since it uses as much as digits as its factorization.

166904149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 166904149 is about 12919.1388644909. The cubic root of 166904149 is about 550.5824672287.

The spelling of 166904149 in words is "one hundred sixty-six million, nine hundred four thousand, one hundred forty-nine".