166672667 has 12 divisors (see below), whose sum is σ = 198615816. Its totient is φ = 139376160.

The previous prime is 166672631. The next prime is 166672711. The reversal of 166672667 is 766276661.

It is not a de Polignac number, because 166672667 - 2⁶ = 166672603 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (166672867) 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 11 ways as a sum of consecutive naturals, for example, 39473 + ... + 43490.

It is an arithmetic number, because the mean of its divisors is an integer number (16551318).

Almost surely, 2^166672667 is an apocalyptic number.

166672667 is a deficient number, since it is larger than the sum of its proper divisors (31943149).

166672667 is an equidigital number, since it uses as much as digits as its factorization.

166672667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83018 (or 83011 counting only the distinct ones).

The product of its digits is 762048, while the sum is 47.

The square root of 166672667 is about 12910.1768771772. The cubic root of 166672667 is about 550.3278122912.

The spelling of 166672667 in words is "one hundred sixty-six million, six hundred seventy-two thousand, six hundred sixty-seven".