6668997608 has 96 divisors (see below), whose sum is σ = 15692430600. Its totient is φ = 2633637888.

The previous prime is 6668997607. The next prime is 6668997611. The reversal of 6668997608 is 8067998666.

It can be written as a sum of positive squares in 4 ways, for example, as 6000361444 + 668636164 = 77462^2 + 25858^2 .

It is not an unprimeable number, because it can be changed into a prime (6668997607) 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, 5141216 + ... + 5142512.

Almost surely, 2^6668997608 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 6668997608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7846215300).

6668997608 is an abundant number, since it is smaller than the sum of its proper divisors (9023432992).

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

6668997608 is a wasteful number, since it uses less digits than its factorization.

6668997608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339 (or 2328 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 65.

The square root of 6668997608 is about 81663.9308875099. The cubic root of 6668997608 is about 1882.2913821800.

The spelling of 6668997608 in words is "six billion, six hundred sixty-eight million, nine hundred ninety-seven thousand, six hundred eight".