666263362666 has 8 divisors (see below), whose sum is σ = 1090249138944. Its totient is φ = 302846983020.

The previous prime is 666263362579. The next prime is 666263362673.

666263362666 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 666263362666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15142349130 + ... + 15142349173.

It is an arithmetic number, because the mean of its divisors is an integer number (136281142368).

Almost surely, 2^666263362666 is an apocalyptic number.

666263362666 is a deficient number, since it is larger than the sum of its proper divisors (423985776278).

666263362666 is a wasteful number, since it uses less digits than its factorization.

666263362666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30284698316.

The product of its digits is 60466176, while the sum is 58.

The spelling of 666263362666 in words is "six hundred sixty-six billion, two hundred sixty-three million, three hundred sixty-two thousand, six hundred sixty-six".