668253352866 has 32 divisors (see below), whose sum is σ = 1471633567488. Its totient is φ = 200608481040.

The previous prime is 668253352859. The next prime is 668253352867.

668253352866 is nontrivially palindromic in base 10.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (668253352867) 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 in 15 ways as a sum of consecutive naturals, for example, 47306260 + ... + 47320383.

It is an arithmetic number, because the mean of its divisors is an integer number (45988548984).

Almost surely, 2^668253352866 is an apocalyptic number.

668253352866 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

668253352866 is an abundant number, since it is smaller than the sum of its proper divisors (803380214622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668253352866 is a wasteful number, since it uses less digits than its factorization.

668253352866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94626766.

The product of its digits is 74649600, while the sum is 60.

The spelling of 668253352866 in words is "six hundred sixty-eight billion, two hundred fifty-three million, three hundred fifty-two thousand, eight hundred sixty-six".