6631887500 has 72 divisors (see below), whose sum is σ = 16578876384. Its totient is φ = 2273760000.

The previous prime is 6631887491. The next prime is 6631887503. The reversal of 6631887500 is 57881366.

It is not an unprimeable number, because it can be changed into a prime (6631887503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49604 + ... + 125396.

It is an arithmetic number, because the mean of its divisors is an integer number (230262172).

Almost surely, 2^6631887500 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 6631887500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8289438192).

6631887500 is an abundant number, since it is smaller than the sum of its proper divisors (9946988884).

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

6631887500 is an equidigital number, since it uses as much as digits as its factorization.

6631887500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75829 (or 75807 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 6631887500 is about 81436.4015658845. The cubic root of 6631887500 is about 1878.7935049798.

The spelling of 6631887500 in words is "six billion, six hundred thirty-one million, eight hundred eighty-seven thousand, five hundred".