18660115 has 8 divisors (see below), whose sum is σ = 22455360. Its totient is φ = 14885952.

The previous prime is 18660091. The next prime is 18660119. The reversal of 18660115 is 51106681.

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

It is a cyclic number.

It is not a de Polignac number, because 18660115 - 2¹³ = 18651923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18660119) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3250 + ... + 6919.

It is an arithmetic number, because the mean of its divisors is an integer number (2806920).

Almost surely, 2^18660115 is an apocalyptic number.

18660115 is a deficient number, since it is larger than the sum of its proper divisors (3795245).

18660115 is a wasteful number, since it uses less digits than its factorization.

18660115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10541.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 18660115 is about 4319.7355243116. The cubic root of 18660115 is about 265.2394418276.

Adding to 18660115 its reverse (51106681), we get a palindrome (69766796).

The spelling of 18660115 in words is "eighteen million, six hundred sixty thousand, one hundred fifteen".