166386018 has 32 divisors (see below), whose sum is σ = 339736320. Its totient is φ = 54308880.

The previous prime is 166386013. The next prime is 166386019. The reversal of 166386018 is 810683661.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (166386013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107913 + ... + 109443.

It is an arithmetic number, because the mean of its divisors is an integer number (10616760).

Almost surely, 2^166386018 is an apocalyptic number.

166386018 is an abundant number, since it is smaller than the sum of its proper divisors (173350302).

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

166386018 is a wasteful number, since it uses less digits than its factorization.

166386018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 166386018 is about 12899.0704316241. The cubic root of 166386018 is about 550.0121407788.

The spelling of 166386018 in words is "one hundred sixty-six million, three hundred eighty-six thousand, eighteen".