6604664 has 24 divisors (see below), whose sum is σ = 13613880. Its totient is φ = 3001680.

The previous prime is 6604651. The next prime is 6604667. The reversal of 6604664 is 4664066.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6604664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6604667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2444 + ... + 4379.

It is an arithmetic number, because the mean of its divisors is an integer number (567245).

Almost surely, 2^6604664 is an apocalyptic number.

It is an amenable number.

6604664 is an abundant number, since it is smaller than the sum of its proper divisors (7009216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6604664 is a wasteful number, since it uses less digits than its factorization.

6604664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6851 (or 6836 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 6604664 is about 2569.9540851930. The cubic root of 6604664 is about 187.6219201128.

The spelling of 6604664 in words is "six million, six hundred four thousand, six hundred sixty-four".