6640828416 has 238 divisors, whose sum is σ = 20056484420. Its totient is φ = 2197684224.

The previous prime is 6640828399. The next prime is 6640828421. The reversal of 6640828416 is 6148280466.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 47775675 + ... + 47775813.

Almost surely, 2^6640828416 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 6640828416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10028242210).

6640828416 is an abundant number, since it is smaller than the sum of its proper divisors (13415656004).

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

6640828416 is an frugal number, since it uses more digits than its factorization.

6640828416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 6640828416 is about 81491.2781590766. The cubic root of 6640828416 is about 1879.6374372510.

The spelling of 6640828416 in words is "six billion, six hundred forty million, eight hundred twenty-eight thousand, four hundred sixteen".