166868667 has 30 divisors (see below), whose sum is σ = 289977468. Its totient is φ = 95351256.

The previous prime is 166868627. The next prime is 166868683. The reversal of 166868667 is 766868661.

It is not a de Polignac number, because 166868667 - 2⁸ = 166868411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166868627) 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 in 29 ways as a sum of consecutive naturals, for example, 17053 + ... + 24990.

Almost surely, 2^166868667 is an apocalyptic number.

166868667 is a deficient number, since it is larger than the sum of its proper divisors (123108801).

166868667 is an equidigital number, since it uses as much as digits as its factorization.

166868667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42069 (or 42053 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 166868667 is about 12917.7655575568. The cubic root of 166868667 is about 550.5434485230.

The spelling of 166868667 in words is "one hundred sixty-six million, eight hundred sixty-eight thousand, six hundred sixty-seven".