666848666 has 24 divisors (see below), whose sum is σ = 1101431520. Its totient is φ = 302573480.

The previous prime is 666848639. The next prime is 666848671.

666848666 is nontrivially palindromic in base 10.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 154445 + ... + 158703.

It is an arithmetic number, because the mean of its divisors is an integer number (45892980).

Almost surely, 2^666848666 is an apocalyptic number.

666848666 is a deficient number, since it is larger than the sum of its proper divisors (434582854).

666848666 is a wasteful number, since it uses less digits than its factorization.

666848666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4930 (or 4919 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 56.

The square root of 666848666 is about 25823.4131361445. The cubic root of 666848666 is about 873.6599530344.

The spelling of 666848666 in words is "six hundred sixty-six million, eight hundred forty-eight thousand, six hundred sixty-six".