6668802666 has 96 divisors (see below), whose sum is σ = 15912000000. Its totient is φ = 2009155104.

The previous prime is 6668802659. The next prime is 6668802719. The reversal of 6668802666 is 6662088666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3924285 + ... + 3925983.

It is an arithmetic number, because the mean of its divisors is an integer number (165750000).

Almost surely, 2^6668802666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6668802666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7956000000).

6668802666 is an abundant number, since it is smaller than the sum of its proper divisors (9243197334).

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

6668802666 is a wasteful number, since it uses less digits than its factorization.

6668802666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248 (or 2245 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The square root of 6668802666 is about 81662.7373163550. The cubic root of 6668802666 is about 1882.2730415316.

The spelling of 6668802666 in words is "six billion, six hundred sixty-eight million, eight hundred two thousand, six hundred sixty-six".