18008166 has 32 divisors (see below), whose sum is σ = 39470976. Its totient is φ = 5432000.

The previous prime is 18008161. The next prime is 18008167. The reversal of 18008166 is 66180081.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18008161) 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, 18061 + ... + 19031.

It is an arithmetic number, because the mean of its divisors is an integer number (1233468).

Almost surely, 2^18008166 is an apocalyptic number.

18008166 is an abundant number, since it is smaller than the sum of its proper divisors (21462810).

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

18008166 is a wasteful number, since it uses less digits than its factorization.

18008166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 18008166 is about 4243.6029503242. The cubic root of 18008166 is about 262.1137648630.

The spelling of 18008166 in words is "eighteen million, eight thousand, one hundred sixty-six".