18660099 has 8 divisors (see below), whose sum is σ = 25552720. Its totient is φ = 12103776.

The previous prime is 18660091. The next prime is 18660119. The reversal of 18660099 is 99006681.

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

It is not a de Polignac number, because 18660099 - 2³ = 18660091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18660091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83944 + ... + 84165.

It is an arithmetic number, because the mean of its divisors is an integer number (3194090).

Almost surely, 2^18660099 is an apocalyptic number.

18660099 is a deficient number, since it is larger than the sum of its proper divisors (6892621).

18660099 is a wasteful number, since it uses less digits than its factorization.

18660099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168149.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 18660099 is about 4319.7336723460. The cubic root of 18660099 is about 265.2393660182.

The spelling of 18660099 in words is "eighteen million, six hundred sixty thousand, ninety-nine".