6663984 has 40 divisors (see below), whose sum is σ = 18123840. Its totient is φ = 2104128.

The previous prime is 6663971. The next prime is 6664019. The reversal of 6663984 is 4893666.

6663984 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2742 + ... + 4565.

It is an arithmetic number, because the mean of its divisors is an integer number (453096).

Almost surely, 2^6663984 is an apocalyptic number.

It is an amenable number.

6663984 is an abundant number, since it is smaller than the sum of its proper divisors (11459856).

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

6663984 is a wasteful number, since it uses less digits than its factorization.

6663984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7337 (or 7331 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 6663984 is about 2581.4693490336. The cubic root of 6663984 is about 188.1819575294.

The spelling of 6663984 in words is "six million, six hundred sixty-three thousand, nine hundred eighty-four".