166384980 has 36 divisors (see below), whose sum is σ = 504701652. Its totient is φ = 44369280.

The previous prime is 166384963. The next prime is 166385027. The reversal of 166384980 is 89483661.

166384980 is a `hidden beast` number, since 1 + 6 + 638 + 4 + 9 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 94711824 + 71673156 = 9732^2 + 8466^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 462001 + ... + 462360.

Almost surely, 2^166384980 is an apocalyptic number.

166384980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166384980 is an abundant number, since it is smaller than the sum of its proper divisors (338316672).

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

166384980 is a wasteful number, since it uses less digits than its factorization.

166384980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924376 (or 924371 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 166384980 is about 12899.0301961039. The cubic root of 166384980 is about 550.0109970253.

The spelling of 166384980 in words is "one hundred sixty-six million, three hundred eighty-four thousand, nine hundred eighty".