668075488326 has 72 divisors (see below), whose sum is σ = 1514684783664. Its totient is φ = 212411437920.

The previous prime is 668075488313. The next prime is 668075488357. The reversal of 668075488326 is 623884570866.

668075488326 is a `hidden beast` number, since 6 + 6 + 8 + 0 + 7 + 548 + 83 + 2 + 6 = 666.

668075488326 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 55755256 + ... + 55767236.

It is an arithmetic number, because the mean of its divisors is an integer number (21037288662).

Almost surely, 2^668075488326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668075488326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (757342391832).

668075488326 is an abundant number, since it is smaller than the sum of its proper divisors (846609295338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668075488326 is a wasteful number, since it uses less digits than its factorization.

668075488326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12746 (or 12376 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 63.

The spelling of 668075488326 in words is "six hundred sixty-eight billion, seventy-five million, four hundred eighty-eight thousand, three hundred twenty-six".