166601933 has 2 divisors, whose sum is σ = 166601934. Its totient is φ = 166601932.

The previous prime is 166601917. The next prime is 166601951. The reversal of 166601933 is 339106661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93276964 + 73324969 = 9658^2 + 8563^2 .

It is a cyclic number.

It is not a de Polignac number, because 166601933 - 2⁴ = 166601917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166601893 and 166601902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166601233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83300966 + 83300967.

It is an arithmetic number, because the mean of its divisors is an integer number (83300967).

Almost surely, 2^166601933 is an apocalyptic number.

It is an amenable number.

166601933 is a deficient number, since it is larger than the sum of its proper divisors (1).

166601933 is an equidigital number, since it uses as much as digits as its factorization.

166601933 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 166601933 is about 12907.4371197384. The cubic root of 166601933 is about 550.2499503034.

The spelling of 166601933 in words is "one hundred sixty-six million, six hundred one thousand, nine hundred thirty-three".