166455380 has 48 divisors (see below), whose sum is σ = 430227840. Its totient is φ = 52679808.

The previous prime is 166455379. The next prime is 166455391. The reversal of 166455380 is 83554661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43910 + ... + 47549.

It is an arithmetic number, because the mean of its divisors is an integer number (8963080).

Almost surely, 2^166455380 is an apocalyptic number.

166455380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166455380 is an abundant number, since it is smaller than the sum of its proper divisors (263772460).

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

166455380 is a wasteful number, since it uses less digits than its factorization.

166455380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91488 (or 91486 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 166455380 is about 12901.7587948310. The cubic root of 166455380 is about 550.0885587426.

The spelling of 166455380 in words is "one hundred sixty-six million, four hundred fifty-five thousand, three hundred eighty".