166140659 has 2 divisors, whose sum is σ = 166140660. Its totient is φ = 166140658.

The previous prime is 166140647. The next prime is 166140673. The reversal of 166140659 is 956041661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166140659 - 2²⁴ = 149363443 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (166140059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83070329 + 83070330.

It is an arithmetic number, because the mean of its divisors is an integer number (83070330).

Almost surely, 2^166140659 is an apocalyptic number.

166140659 is a deficient number, since it is larger than the sum of its proper divisors (1).

166140659 is an equidigital number, since it uses as much as digits as its factorization.

166140659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 166140659 is about 12889.5561987215. The cubic root of 166140659 is about 549.7416516693.

The spelling of 166140659 in words is "one hundred sixty-six million, one hundred forty thousand, six hundred fifty-nine".