668354673716 has 12 divisors (see below), whose sum is σ = 1178158057188. Its totient is φ = 331738085952.

The previous prime is 668354673691. The next prime is 668354673743. The reversal of 668354673716 is 617376453866.

It can be written as a sum of positive squares in 2 ways, for example, as 203217033616 + 465137640100 = 450796^2 + 682010^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609812111 + ... + 609813206.

It is an arithmetic number, because the mean of its divisors is an integer number (98179838099).

Almost surely, 2^668354673716 is an apocalyptic number.

It is an amenable number.

668354673716 is a deficient number, since it is larger than the sum of its proper divisors (509803383472).

668354673716 is a wasteful number, since it uses less digits than its factorization.

668354673716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219625458 (or 1219625456 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 62.

The spelling of 668354673716 in words is "six hundred sixty-eight billion, three hundred fifty-four million, six hundred seventy-three thousand, seven hundred sixteen".