6648320 has 120 divisors (see below), whose sum is σ = 18892764. Its totient is φ = 2236416.

The previous prime is 6648307. The next prime is 6648331. The reversal of 6648320 is 238466.

It can be written as a sum of positive squares in 2 ways, for example, as 6635776 + 12544 = 2576^2 + 112^2 .

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, 125414 + ... + 125466.

Almost surely, 2^6648320 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 6648320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9446382).

6648320 is an abundant number, since it is smaller than the sum of its proper divisors (12244444).

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

6648320 is an equidigital number, since it uses as much as digits as its factorization.

6648320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 6648320 is about 2578.4336330416. The cubic root of 6648320 is about 188.0343984137.

The spelling of 6648320 in words is "six million, six hundred forty-eight thousand, three hundred twenty".