6668463566 has 4 divisors (see below), whose sum is σ = 10002695352. Its totient is φ = 3334231782.

The previous prime is 6668463563. The next prime is 6668463587. The reversal of 6668463566 is 6653648666.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668463563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1667115890 + ... + 1667115893.

It is an arithmetic number, because the mean of its divisors is an integer number (2500673838).

Almost surely, 2^6668463566 is an apocalyptic number.

6668463566 is a deficient number, since it is larger than the sum of its proper divisors (3334231786).

6668463566 is a wasteful number, since it uses less digits than its factorization.

6668463566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334231785.

The product of its digits is 22394880, while the sum is 56.

The square root of 6668463566 is about 81660.6610676157. The cubic root of 6668463566 is about 1882.2411372733.

The spelling of 6668463566 in words is "six billion, six hundred sixty-eight million, four hundred sixty-three thousand, five hundred sixty-six".