166693013 has 2 divisors, whose sum is σ = 166693014. Its totient is φ = 166693012.

The previous prime is 166692997. The next prime is 166693049. The reversal of 166693013 is 310396661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100140049 + 66552964 = 10007^2 + 8158^2 .

It is a cyclic number.

It is not a de Polignac number, because 166693013 - 2⁴ = 166692997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166693613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83346506 + 83346507.

It is an arithmetic number, because the mean of its divisors is an integer number (83346507).

Almost surely, 2^166693013 is an apocalyptic number.

It is an amenable number.

166693013 is a deficient number, since it is larger than the sum of its proper divisors (1).

166693013 is an equidigital number, since it uses as much as digits as its factorization.

166693013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 166693013 is about 12910.9648361383. The cubic root of 166693013 is about 550.3502045132.

The spelling of 166693013 in words is "one hundred sixty-six million, six hundred ninety-three thousand, thirteen".