166566330 has 48 divisors (see below), whose sum is σ = 494941824. Its totient is φ = 38072160.

The previous prime is 166566319. The next prime is 166566359. The reversal of 166566330 is 33665661.

It is a happy number.

166566330 is a `hidden beast` number, since 1 + 66 + 566 + 3 + 30 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131566 + ... + 132825.

It is an arithmetic number, because the mean of its divisors is an integer number (10311288).

Almost surely, 2^166566330 is an apocalyptic number.

166566330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166566330 is an abundant number, since it is smaller than the sum of its proper divisors (328375494).

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

166566330 is a wasteful number, since it uses less digits than its factorization.

166566330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264411 (or 264408 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 166566330 is about 12906.0578799260. The cubic root of 166566330 is about 550.2107511891.

The spelling of 166566330 in words is "one hundred sixty-six million, five hundred sixty-six thousand, three hundred thirty".