6663883666 has 16 divisors (see below), whose sum is σ = 10907344800. Its totient is φ = 3028258080.

The previous prime is 6663883643. The next prime is 6663883687.

It is a happy number.

6663883666 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6663883666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53230 + ... + 127126.

It is an arithmetic number, because the mean of its divisors is an integer number (681709050).

Almost surely, 2^6663883666 is an apocalyptic number.

6663883666 is a deficient number, since it is larger than the sum of its proper divisors (4243461134).

6663883666 is a wasteful number, since it uses less digits than its factorization.

6663883666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78009.

The product of its digits is 26873856, while the sum is 58.

The square root of 6663883666 is about 81632.6139848529. The cubic root of 6663883666 is about 1881.8101309220.

The spelling of 6663883666 in words is "six billion, six hundred sixty-three million, eight hundred eighty-three thousand, six hundred sixty-six".