7987525668 has 72 divisors (see below), whose sum is σ = 21130869760. Its totient is φ = 2638046880.

The previous prime is 7987525661. The next prime is 7987525699. The reversal of 7987525668 is 8665257897.

It is not an unprimeable number, because it can be changed into a prime (7987525661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68253 + ... + 143643.

Almost surely, 2^7987525668 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 7987525668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10565434880).

7987525668 is an abundant number, since it is smaller than the sum of its proper divisors (13143344092).

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

7987525668 is a wasteful number, since it uses less digits than its factorization.

7987525668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75519 (or 75505 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 63.

The square root of 7987525668 is about 89372.9582591961. The cubic root of 7987525668 is about 1998.9599315559.

The spelling of 7987525668 in words is "seven billion, nine hundred eighty-seven million, five hundred twenty-five thousand, six hundred sixty-eight".