18085566 has 8 divisors (see below), whose sum is σ = 36171144. Its totient is φ = 6028520.

The previous prime is 18085559. The next prime is 18085597. The reversal of 18085566 is 66558081.

It is a sphenic number, since it is the product of 3 distinct primes.

18085566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1507125 + ... + 1507136.

It is an arithmetic number, because the mean of its divisors is an integer number (4521393).

Almost surely, 2^18085566 is an apocalyptic number.

18085566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18085566 is a wasteful number, since it uses less digits than its factorization.

18085566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014266.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 18085566 is about 4252.7127812727. The cubic root of 18085566 is about 262.4887541667.

The spelling of 18085566 in words is "eighteen million, eighty-five thousand, five hundred sixty-six".