668860579689 has 8 divisors (see below), whose sum is σ = 891818776320. Its totient is φ = 445904718096.

The previous prime is 668860579679. The next prime is 668860579697. The reversal of 668860579689 is 986975068866.

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

It is not a de Polignac number, because 668860579689 - 2⁸ = 668860579433 is a prime.

It is a super-3 number, since 3×668860579689³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (668860579679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258024 + ... + 1185030.

It is an arithmetic number, because the mean of its divisors is an integer number (111477347040).

Almost surely, 2^668860579689 is an apocalyptic number.

It is an amenable number.

668860579689 is a deficient number, since it is larger than the sum of its proper divisors (222958196631).

668860579689 is a wasteful number, since it uses less digits than its factorization.

668860579689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167519.

The product of its (nonzero) digits is 1881169920, while the sum is 78.

The spelling of 668860579689 in words is "six hundred sixty-eight billion, eight hundred sixty million, five hundred seventy-nine thousand, six hundred eighty-nine".