18664966 has 8 divisors (see below), whose sum is σ = 28026144. Its totient is φ = 9322920.

The previous prime is 18664949. The next prime is 18664981. The reversal of 18664966 is 66946681.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2025 + ... + 6436.

It is an arithmetic number, because the mean of its divisors is an integer number (3503268).

Almost surely, 2^18664966 is an apocalyptic number.

18664966 is a deficient number, since it is larger than the sum of its proper divisors (9361178).

18664966 is a wasteful number, since it uses less digits than its factorization.

18664966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9566.

The product of its digits is 373248, while the sum is 46.

The square root of 18664966 is about 4320.2969805327. The cubic root of 18664966 is about 265.2624242699.

The spelling of 18664966 in words is "eighteen million, six hundred sixty-four thousand, nine hundred sixty-six".