6644990 has 32 divisors (see below), whose sum is σ = 13157856. Its totient is φ = 2396160.

The previous prime is 6644983. The next prime is 6645013. The reversal of 6644990 is 994466.

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, 21074 + ... + 21386.

It is an arithmetic number, because the mean of its divisors is an integer number (411183).

Almost surely, 2^6644990 is an apocalyptic number.

6644990 is a deficient number, since it is larger than the sum of its proper divisors (6512866).

6644990 is a wasteful number, since it uses less digits than its factorization.

6644990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 6644990 is about 2577.7878112832. The cubic root of 6644990 is about 188.0029990468.

The spelling of 6644990 in words is "six million, six hundred forty-four thousand, nine hundred ninety".