6604 has 12 divisors (see below), whose sum is σ = 12544. Its totient is φ = 3024.

The previous prime is 6599. The next prime is 6607. The reversal of 6604 is 4066.

6604 = T₂₇ + T₂₈ + ... + T₃₈.

It is a super-2 number, since 2×6604² = 87225632, which contains 22 as substring.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 14 and base 16.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12 + ... + 115.

2⁶⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

6604 is a deficient number, since it is larger than the sum of its proper divisors (5940).

6604 is a wasteful number, since it uses less digits than its factorization.

6604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 6604 is about 81.2649986156. The cubic root of 6604 is about 18.7615632378.

The spelling of 6604 in words is "six thousand, six hundred four".