166380372 has 24 divisors (see below), whose sum is σ = 431356800. Its totient is φ = 55460088.

The previous prime is 166380353. The next prime is 166380433. The reversal of 166380372 is 273083661.

It is a happy number.

166380372 is a `hidden beast` number, since 16 + 638 + 0 + 3 + 7 + 2 = 666.

166380372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770172 + ... + 770387.

It is an arithmetic number, because the mean of its divisors is an integer number (17973200).

Almost surely, 2^166380372 is an apocalyptic number.

166380372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166380372 is an abundant number, since it is smaller than the sum of its proper divisors (264976428).

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

166380372 is a wasteful number, since it uses less digits than its factorization.

166380372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540572 (or 1540564 counting only the distinct ones).

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

The square root of 166380372 is about 12898.8515767878. The cubic root of 166380372 is about 550.0059194955.

The spelling of 166380372 in words is "one hundred sixty-six million, three hundred eighty thousand, three hundred seventy-two".