6639700 has 36 divisors (see below), whose sum is σ = 14637952. Its totient is φ = 2613600.

The previous prime is 6639697. The next prime is 6639719. The reversal of 6639700 is 79366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6205 + ... + 7195.

Almost surely, 2^6639700 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 6639700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7318976).

6639700 is an abundant number, since it is smaller than the sum of its proper divisors (7998252).

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

6639700 is a wasteful number, since it uses less digits than its factorization.

6639700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 6639700 is about 2576.7615333981. The cubic root of 6639700 is about 187.9530967949.

The spelling of 6639700 in words is "six million, six hundred thirty-nine thousand, seven hundred".