6664944 has 80 divisors (see below), whose sum is σ = 20248704. Its totient is φ = 1862400.

The previous prime is 6664939. The next prime is 6664951. The reversal of 6664944 is 4494666.

6664944 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6379 + ... + 7349.

Almost surely, 2^6664944 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 6664944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10124352).

6664944 is an abundant number, since it is smaller than the sum of its proper divisors (13583760).

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

6664944 is a wasteful number, since it uses less digits than its factorization.

6664944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 1000 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 6664944 is about 2581.6552829532. The cubic root of 6664944 is about 188.1909934657.

The spelling of 6664944 in words is "six million, six hundred sixty-four thousand, nine hundred forty-four".