668754686594 has 16 divisors (see below), whose sum is σ = 1009524612096. Its totient is φ = 332249598000.

The previous prime is 668754686591. The next prime is 668754686599. The reversal of 668754686594 is 495686457866.

It is not an unprimeable number, because it can be changed into a prime (668754686591) 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 7 ways as a sum of consecutive naturals, for example, 348482 + ... + 1207869.

It is an arithmetic number, because the mean of its divisors is an integer number (63095288256).

Almost surely, 2^668754686594 is an apocalyptic number.

668754686594 is a deficient number, since it is larger than the sum of its proper divisors (340769925502).

668754686594 is a wasteful number, since it uses less digits than its factorization.

668754686594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557721.

The product of its digits is 2090188800, while the sum is 74.

The spelling of 668754686594 in words is "six hundred sixty-eight billion, seven hundred fifty-four million, six hundred eighty-six thousand, five hundred ninety-four".