6639320 has 16 divisors (see below), whose sum is σ = 14938560. Its totient is φ = 2655712.

The previous prime is 6639313. The next prime is 6639331. The reversal of 6639320 is 239366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82952 + ... + 83031.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^6639320 is an apocalyptic number.

It is an amenable number.

6639320 is an abundant number, since it is smaller than the sum of its proper divisors (8299240).

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

6639320 is a wasteful number, since it uses less digits than its factorization.

6639320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165994 (or 165990 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 6639320 is about 2576.6877963774. The cubic root of 6639320 is about 187.9495111138.

The spelling of 6639320 in words is "six million, six hundred thirty-nine thousand, three hundred twenty".