668387343759 has 16 divisors (see below), whose sum is σ = 892330909824. Its totient is φ = 445018039200.

The previous prime is 668387343749. The next prime is 668387343763. The reversal of 668387343759 is 957343783866.

It is not a de Polignac number, because 668387343759 - 2⁵ = 668387343727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668387343693 and 668387343702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668387343749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7458432 + ... + 7547514.

It is an arithmetic number, because the mean of its divisors is an integer number (55770681864).

Almost surely, 2^668387343759 is an apocalyptic number.

668387343759 is a deficient number, since it is larger than the sum of its proper divisors (223943566065).

668387343759 is a wasteful number, since it uses less digits than its factorization.

668387343759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92278.

The product of its digits is 548674560, while the sum is 69.

The spelling of 668387343759 in words is "six hundred sixty-eight billion, three hundred eighty-seven million, three hundred forty-three thousand, seven hundred fifty-nine".