166804133 has 2 divisors, whose sum is σ = 166804134. Its totient is φ = 166804132.

The previous prime is 166804061. The next prime is 166804139. The reversal of 166804133 is 331408661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166745569 + 58564 = 12913^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 166804133 - 2⁸ = 166803877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166804133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166804139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83402066 + 83402067.

It is an arithmetic number, because the mean of its divisors is an integer number (83402067).

Almost surely, 2^166804133 is an apocalyptic number.

It is an amenable number.

166804133 is a deficient number, since it is larger than the sum of its proper divisors (1).

166804133 is an equidigital number, since it uses as much as digits as its factorization.

166804133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 166804133 is about 12915.2674381911. The cubic root of 166804133 is about 550.4724678478.

The spelling of 166804133 in words is "one hundred sixty-six million, eight hundred four thousand, one hundred thirty-three".