166664388 has 48 divisors (see below), whose sum is σ = 434117376. Its totient is φ = 49328160.

The previous prime is 166664387. The next prime is 166664389. The reversal of 166664388 is 883466661.

166664388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166664387) and next prime (166664389).

It is not an unprimeable number, because it can be changed into a prime (166664387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9006 + ... + 20357.

It is an arithmetic number, because the mean of its divisors is an integer number (9044112).

Almost surely, 2^166664388 is an apocalyptic number.

It is an amenable number.

166664388 is an abundant number, since it is smaller than the sum of its proper divisors (267452988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166664388 is a wasteful number, since it uses less digits than its factorization.

166664388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29424 (or 29422 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The square root of 166664388 is about 12909.8562346759. The cubic root of 166664388 is about 550.3187001405.

The spelling of 166664388 in words is "one hundred sixty-six million, six hundred sixty-four thousand, three hundred eighty-eight".