18066775 has 12 divisors (see below), whose sum is σ = 22550392. Its totient is φ = 14358240.

The previous prime is 18066749. The next prime is 18066809. The reversal of 18066775 is 57766081.

It is not a de Polignac number, because 18066775 - 2⁵ = 18066743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1624 + ... + 6226.

Almost surely, 2^18066775 is an apocalyptic number.

18066775 is a deficient number, since it is larger than the sum of its proper divisors (4483617).

18066775 is a wasteful number, since it uses less digits than its factorization.

18066775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770 (or 4765 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 18066775 is about 4250.5029114212. The cubic root of 18066775 is about 262.3978135894.

The spelling of 18066775 in words is "eighteen million, sixty-six thousand, seven hundred seventy-five".