6639014328 has 64 divisors (see below), whose sum is σ = 16967439360. Its totient is φ = 2163778176.

The previous prime is 6639014323. The next prime is 6639014407. The reversal of 6639014328 is 8234109366.

It is a super-2 number, since 2×6639014328² = 88153022494778583168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6639014328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639014321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1467526 + ... + 1472042.

It is an arithmetic number, because the mean of its divisors is an integer number (265116240).

Almost surely, 2^6639014328 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 6639014328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8483719680).

6639014328 is an abundant number, since it is smaller than the sum of its proper divisors (10328425032).

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

6639014328 is a wasteful number, since it uses less digits than its factorization.

6639014328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5876 (or 5872 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 6639014328 is about 81480.1468334465. The cubic root of 6639014328 is about 1879.4662669269.

The spelling of 6639014328 in words is "six billion, six hundred thirty-nine million, fourteen thousand, three hundred twenty-eight".