668459383954866 has 48 divisors (see below), whose sum is σ = 1699968780828864. Its totient is φ = 185826546889632.

The previous prime is 668459383954861. The next prime is 668459383954919.

668459383954866 is a `hidden beast` number, since 6 + 6 + 8 + 4 + 5 + 9 + 38 + 3 + 95 + 486 + 6 = 666.

668459383954866 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (668459383954861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71692335960 + ... + 71692345283.

It is an arithmetic number, because the mean of its divisors is an integer number (35416016267268).

Almost surely, 2^{668459383954866} is an apocalyptic number.

668459383954866 is an abundant number, since it is smaller than the sum of its proper divisors (1031509396873998).

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

668459383954866 is a wasteful number, since it uses less digits than its factorization.

668459383954866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143384681295 (or 143384681292 counting only the distinct ones).

The product of its digits is 193491763200, while the sum is 90.

The spelling of 668459383954866 in words is "six hundred sixty-eight trillion, four hundred fifty-nine billion, three hundred eighty-three million, nine hundred fifty-four thousand, eight hundred sixty-six".