16618361 has 4 divisors (see below), whose sum is σ = 16828800. Its totient is φ = 16407924.

The previous prime is 16618321. The next prime is 16618373. The reversal of 16618361 is 16381661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16618361 - 2⁶ = 16618297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16618321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105101 + ... + 105258.

It is an arithmetic number, because the mean of its divisors is an integer number (4207200).

Almost surely, 2^16618361 is an apocalyptic number.

It is an amenable number.

16618361 is a deficient number, since it is larger than the sum of its proper divisors (210439).

16618361 is an equidigital number, since it uses as much as digits as its factorization.

16618361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210438.

The product of its digits is 5184, while the sum is 32.

The square root of 16618361 is about 4076.5623998658. The cubic root of 16618361 is about 255.1894580752.

The spelling of 16618361 in words is "sixteen million, six hundred eighteen thousand, three hundred sixty-one".