166381306 has 32 divisors (see below), whose sum is σ = 310020480. Its totient is φ = 65209536.

The previous prime is 166381291. The next prime is 166381337. The reversal of 166381306 is 603183661.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 15645 + ... + 24031.

It is an arithmetic number, because the mean of its divisors is an integer number (9688140).

Almost surely, 2^166381306 is an apocalyptic number.

166381306 is a deficient number, since it is larger than the sum of its proper divisors (143639174).

166381306 is a wasteful number, since it uses less digits than its factorization.

166381306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8518.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 166381306 is about 12898.8877815105. The cubic root of 166381306 is about 550.0069486725.

The spelling of 166381306 in words is "one hundred sixty-six million, three hundred eighty-one thousand, three hundred six".