668449917359 has 16 divisors (see below), whose sum is σ = 774459005760. Its totient is φ = 565070929920.

The previous prime is 668449917353. The next prime is 668449917397. The reversal of 668449917359 is 953719944866.

It is a de Polignac number, because none of the positive numbers 2^k-668449917359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 668449917292 and 668449917301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668449917353) 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, 9925319 + ... + 9992439.

It is an arithmetic number, because the mean of its divisors is an integer number (48403687860).

Almost surely, 2^668449917359 is an apocalyptic number.

668449917359 is a deficient number, since it is larger than the sum of its proper divisors (106009088401).

668449917359 is a wasteful number, since it uses less digits than its factorization.

668449917359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86690.

The product of its digits is 352719360, while the sum is 71.

The spelling of 668449917359 in words is "six hundred sixty-eight billion, four hundred forty-nine million, nine hundred seventeen thousand, three hundred fifty-nine".