166640059 has 2 divisors, whose sum is σ = 166640060. Its totient is φ = 166640058.

The previous prime is 166640057. The next prime is 166640063. The reversal of 166640059 is 950046661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166640059 - 2¹ = 166640057 is a prime.

Together with 166640057, it forms a pair of twin primes.

It is equal to p_9325594 and since 166640059 and 9325594 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (166640057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83320029 + 83320030.

It is an arithmetic number, because the mean of its divisors is an integer number (83320030).

Almost surely, 2^166640059 is an apocalyptic number.

166640059 is a deficient number, since it is larger than the sum of its proper divisors (1).

166640059 is an equidigital number, since it uses as much as digits as its factorization.

166640059 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 37.

The square root of 166640059 is about 12908.9139357267. The cubic root of 166640059 is about 550.2919210640.

The spelling of 166640059 in words is "one hundred sixty-six million, six hundred forty thousand, fifty-nine".