166878113 has 2 divisors, whose sum is σ = 166878114. Its totient is φ = 166878112.

The previous prime is 166878097. The next prime is 166878119. The reversal of 166878113 is 311878661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126517504 + 40360609 = 11248^2 + 6353^2 .

It is a cyclic number.

It is not a de Polignac number, because 166878113 - 2⁴ = 166878097 is a prime.

It is not a weakly prime, because it can be changed into another prime (166878119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83439056 + 83439057.

It is an arithmetic number, because the mean of its divisors is an integer number (83439057).

Almost surely, 2^166878113 is an apocalyptic number.

It is an amenable number.

166878113 is a deficient number, since it is larger than the sum of its proper divisors (1).

166878113 is an equidigital number, since it uses as much as digits as its factorization.

166878113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 166878113 is about 12918.1311728903. The cubic root of 166878113 is about 550.5538366032.

The spelling of 166878113 in words is "one hundred sixty-six million, eight hundred seventy-eight thousand, one hundred thirteen".