6640284224 has 56 divisors (see below), whose sum is σ = 15122469120. Its totient is φ = 2833883136.

The previous prime is 6640284199. The next prime is 6640284229. The reversal of 6640284224 is 4224820466.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (6640284229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76064 + ... + 138080.

Almost surely, 2^6640284224 is an apocalyptic number.

6640284224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6640284224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7561234560).

6640284224 is an abundant number, since it is smaller than the sum of its proper divisors (8482184896).

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

6640284224 is a wasteful number, since it uses less digits than its factorization.

6640284224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62275 (or 62265 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 38.

The square root of 6640284224 is about 81487.9391321194. The cubic root of 6640284224 is about 1879.5860926730.

The spelling of 6640284224 in words is "six billion, six hundred forty million, two hundred eighty-four thousand, two hundred twenty-four".