6684664 has 32 divisors (see below), whose sum is σ = 14515200. Its totient is φ = 2826720.

The previous prime is 6684659. The next prime is 6684673. The reversal of 6684664 is 4664866.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 3669 + ... + 5179.

It is an arithmetic number, because the mean of its divisors is an integer number (453600).

Almost surely, 2^6684664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6684664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7257600).

6684664 is an abundant number, since it is smaller than the sum of its proper divisors (7830536).

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

6684664 is a wasteful number, since it uses less digits than its factorization.

6684664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603 (or 1599 counting only the distinct ones).

The product of its digits is 165888, while the sum is 40.

The square root of 6684664 is about 2585.4717171147. The cubic root of 6684664 is about 188.3764149926.

The spelling of 6684664 in words is "six million, six hundred eighty-four thousand, six hundred sixty-four".