16604669 has 4 divisors (see below), whose sum is σ = 16615200. Its totient is φ = 16594140.

The previous prime is 16604657. The next prime is 16604683. The reversal of 16604669 is 96640661.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96640661 = 13 ⋅7433897.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16604669 is a prime.

It is a super-2 number, since 2×16604669² = 551430065199122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16604629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2369 + ... + 6230.

It is an arithmetic number, because the mean of its divisors is an integer number (4153800).

Almost surely, 2^16604669 is an apocalyptic number.

It is an amenable number.

16604669 is a deficient number, since it is larger than the sum of its proper divisors (10531).

16604669 is an equidigital number, since it uses as much as digits as its factorization.

16604669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 16604669 is about 4074.8826976982. The cubic root of 16604669 is about 255.1193546096.

The spelling of 16604669 in words is "sixteen million, six hundred four thousand, six hundred sixty-nine".