166339907 has 2 divisors, whose sum is σ = 166339908. Its totient is φ = 166339906.

The previous prime is 166339897. The next prime is 166339949. The reversal of 166339907 is 709933661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166339907 - 2⁸ = 166339651 is a prime.

It is not a weakly prime, because it can be changed into another prime (166339967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83169953 + 83169954.

It is an arithmetic number, because the mean of its divisors is an integer number (83169954).

Almost surely, 2^166339907 is an apocalyptic number.

166339907 is a deficient number, since it is larger than the sum of its proper divisors (1).

166339907 is an equidigital number, since it uses as much as digits as its factorization.

166339907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 166339907 is about 12897.2829309122. The cubic root of 166339907 is about 549.9613273084.

The spelling of 166339907 in words is "one hundred sixty-six million, three hundred thirty-nine thousand, nine hundred seven".