16618111 has 2 divisors, whose sum is σ = 16618112. Its totient is φ = 16618110.

The previous prime is 16618099. The next prime is 16618157. The reversal of 16618111 is 11181661.

It is a weak prime.

It is an emirp because it is prime and its reverse (11181661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16618111 - 2⁹ = 16617599 is a prime.

It is a super-2 number, since 2×16618111² = 552323226416642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16618171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8309055 + 8309056.

It is an arithmetic number, because the mean of its divisors is an integer number (8309056).

Almost surely, 2^16618111 is an apocalyptic number.

16618111 is a deficient number, since it is larger than the sum of its proper divisors (1).

16618111 is an equidigital number, since it uses as much as digits as its factorization.

16618111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 25.

The square root of 16618111 is about 4076.5317366605. The cubic root of 16618111 is about 255.1881784126.

Adding to 16618111 its reverse (11181661), we get a palindrome (27799772).

The spelling of 16618111 in words is "sixteen million, six hundred eighteen thousand, one hundred eleven".