18665066 has 8 divisors (see below), whose sum is σ = 31997280. Its totient is φ = 7999308.

The previous prime is 18665039. The next prime is 18665071. The reversal of 18665066 is 66056681.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666596 + ... + 666623.

It is an arithmetic number, because the mean of its divisors is an integer number (3999660).

Almost surely, 2^18665066 is an apocalyptic number.

18665066 is a deficient number, since it is larger than the sum of its proper divisors (13332214).

18665066 is a wasteful number, since it uses less digits than its factorization.

18665066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333228.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 18665066 is about 4320.3085537957. The cubic root of 18665066 is about 265.2628979951.

The spelling of 18665066 in words is "eighteen million, six hundred sixty-five thousand, sixty-six".