18106665 has 8 divisors (see below), whose sum is σ = 28970688. Its totient is φ = 9656880.

The previous prime is 18106661. The next prime is 18106667. The reversal of 18106665 is 56660181.

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

It is not a de Polignac number, because 18106665 - 2² = 18106661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18106661) 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, 603541 + ... + 603570.

It is an arithmetic number, because the mean of its divisors is an integer number (3621336).

Almost surely, 2^18106665 is an apocalyptic number.

18106665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18106665 is a deficient number, since it is larger than the sum of its proper divisors (10864023).

18106665 is a wasteful number, since it uses less digits than its factorization.

18106665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207119.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 18106665 is about 4255.1927100896. The cubic root of 18106665 is about 262.5907894572.

The spelling of 18106665 in words is "eighteen million, one hundred six thousand, six hundred sixty-five".