16618 has 8 divisors (see below), whose sum is σ = 28512. Its totient is φ = 7116.

The previous prime is 16607. The next prime is 16619. The reversal of 16618 is 81661.

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

It is a nialpdrome in base 7 and base 13.

It is a zygodrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (16619) by changing a digit.

16618 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580 + ... + 607.

It is an arithmetic number, because the mean of its divisors is an integer number (3564).

2¹⁶⁶¹⁸ is an apocalyptic number.

16618 is a deficient number, since it is larger than the sum of its proper divisors (11894).

16618 is a wasteful number, since it uses less digits than its factorization.

16618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196.

The product of its digits is 288, while the sum is 22.

The square root of 16618 is about 128.9108218886. The cubic root of 16618 is about 25.5187610238.

The spelling of 16618 in words is "sixteen thousand, six hundred eighteen".