18660159 has 16 divisors (see below), whose sum is σ = 31594240. Its totient is φ = 10662840.

The previous prime is 18660157. The next prime is 18660179. The reversal of 18660159 is 95106681.

It is not a de Polignac number, because 18660159 - 2¹ = 18660157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18660157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49177 + ... + 49554.

It is an arithmetic number, because the mean of its divisors is an integer number (1974640).

Almost surely, 2^18660159 is an apocalyptic number.

18660159 is a deficient number, since it is larger than the sum of its proper divisors (12934081).

18660159 is an equidigital number, since it uses as much as digits as its factorization.

18660159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98747 (or 98741 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 18660159 is about 4319.7406172130. The cubic root of 18660159 is about 265.2396503030.

The spelling of 18660159 in words is "eighteen million, six hundred sixty thousand, one hundred fifty-nine".