6657988000 has 96 divisors (see below), whose sum is σ = 16390155600. Its totient is φ = 2658073600.

The previous prime is 6657987989. The next prime is 6657988003. The reversal of 6657988000 is 8897566.

It can be written as a sum of positive squares in 8 ways, for example, as 553378576 + 6104609424 = 23524^2 + 78132^2 .

It is not an unprimeable number, because it can be changed into a prime (6657988003) 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, 2610726 + ... + 2613274.

Almost surely, 2^6657988000 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 6657988000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8195077800).

6657988000 is an abundant number, since it is smaller than the sum of its proper divisors (9732167600).

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

6657988000 is a wasteful number, since it uses less digits than its factorization.

6657988000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227 (or 3209 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 6657988000 is about 81596.4950227643. The cubic root of 6657988000 is about 1881.2550093133.

The spelling of 6657988000 in words is "six billion, six hundred fifty-seven million, nine hundred eighty-eight thousand".