166664007 has 8 divisors (see below), whose sum is σ = 246909680. Its totient is φ = 111109320.

The previous prime is 166663997. The next prime is 166664011. The reversal of 166664007 is 700466661.

It is not a de Polignac number, because 166664007 - 2¹⁴ = 166647623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166664027) 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 7 ways as a sum of consecutive naturals, for example, 3086344 + ... + 3086397.

It is an arithmetic number, because the mean of its divisors is an integer number (30863710).

Almost surely, 2^166664007 is an apocalyptic number.

166664007 is a deficient number, since it is larger than the sum of its proper divisors (80245673).

166664007 is an equidigital number, since it uses as much as digits as its factorization.

166664007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6172750 (or 6172744 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 166664007 is about 12909.8414785000. The cubic root of 166664007 is about 550.3182807916.

The spelling of 166664007 in words is "one hundred sixty-six million, six hundred sixty-four thousand, seven".