7988335668 has 120 divisors (see below), whose sum is σ = 21640965192. Its totient is φ = 2567448576.

The previous prime is 7988335637. The next prime is 7988335727. The reversal of 7988335668 is 8665338897.

It can be written as a sum of positive squares in 4 ways, for example, as 2133331344 + 5855004324 = 46188^2 + 76518^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1351696 + ... + 1357592.

Almost surely, 2^7988335668 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 7988335668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10820482596).

7988335668 is an abundant number, since it is smaller than the sum of its proper divisors (13652629524).

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

7988335668 is a wasteful number, since it uses less digits than its factorization.

7988335668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6063 (or 6052 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The square root of 7988335668 is about 89377.4897163710. The cubic root of 7988335668 is about 1999.0274995314.

The spelling of 7988335668 in words is "seven billion, nine hundred eighty-eight million, three hundred thirty-five thousand, six hundred sixty-eight".