18066699 has 32 divisors (see below), whose sum is σ = 32394240. Its totient is φ = 9714816.

The previous prime is 18066679. The next prime is 18066709. The reversal of 18066699 is 99666081.

It is not a de Polignac number, because 18066699 - 2⁷ = 18066571 is a prime.

It is a super-2 number, since 2×18066699² = 652811225513202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18066679) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402 + ... + 6024.

It is an arithmetic number, because the mean of its divisors is an integer number (1012320).

Almost surely, 2^18066699 is an apocalyptic number.

18066699 is a deficient number, since it is larger than the sum of its proper divisors (14327541).

18066699 is a wasteful number, since it uses less digits than its factorization.

18066699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5656 (or 5650 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 18066699 is about 4250.4939712932. The cubic root of 18066699 is about 262.3974456532.

The spelling of 18066699 in words is "eighteen million, sixty-six thousand, six hundred ninety-nine".