166664020 has 24 divisors (see below), whose sum is σ = 350711424. Its totient is φ = 66529056.

The previous prime is 166664011. The next prime is 166664027. The reversal of 166664020 is 20466661.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1777 + ... + 18343.

It is an arithmetic number, because the mean of its divisors is an integer number (14612976).

Almost surely, 2^166664020 is an apocalyptic number.

166664020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166664020 is an abundant number, since it is smaller than the sum of its proper divisors (184047404).

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

166664020 is a wasteful number, since it uses less digits than its factorization.

166664020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17079 (or 17077 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 166664020 is about 12909.8419819919. The cubic root of 166664020 is about 550.3182951001.

The spelling of 166664020 in words is "one hundred sixty-six million, six hundred sixty-four thousand, twenty".