6666776608 has 24 divisors (see below), whose sum is σ = 13228572672. Its totient is φ = 3307139136.

The previous prime is 6666776603. The next prime is 6666776647. The reversal of 6666776608 is 8066776666.

It is not an unprimeable number, because it can be changed into a prime (6666776603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816160 + ... + 824287.

It is an arithmetic number, because the mean of its divisors is an integer number (551190528).

Almost surely, 2^6666776608 is an apocalyptic number.

It is an amenable number.

6666776608 is a deficient number, since it is larger than the sum of its proper divisors (6561796064).

6666776608 is a wasteful number, since it uses less digits than its factorization.

6666776608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640584 (or 1640576 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 58.

The square root of 6666776608 is about 81650.3313404177. The cubic root of 6666776608 is about 1882.0824035808.

Adding to 6666776608 its sum of digits (58), we get a palindrome (6666776666).

The spelling of 6666776608 in words is "six billion, six hundred sixty-six million, seven hundred seventy-six thousand, six hundred eight".