668616108347 has 8 divisors (see below), whose sum is σ = 749112888432. Its totient is φ = 591404911200.

The previous prime is 668616108341. The next prime is 668616108403. The reversal of 668616108347 is 743801616866.

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

It is a cyclic number.

It is not a de Polignac number, because 668616108347 - 2¹² = 668616104251 is a prime.

It is a super-3 number, since 3×668616108347³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 668616108292 and 668616108301.

It is not an unprimeable number, because it can be changed into a prime (668616108341) 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, 821395304 + ... + 821396117.

It is an arithmetic number, because the mean of its divisors is an integer number (93639111054).

Almost surely, 2^668616108347 is an apocalyptic number.

668616108347 is a deficient number, since it is larger than the sum of its proper divisors (80496780085).

668616108347 is a wasteful number, since it uses less digits than its factorization.

668616108347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642791469.

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 668616108347 in words is "six hundred sixty-eight billion, six hundred sixteen million, one hundred eight thousand, three hundred forty-seven".