668272625860 has 192 divisors, whose sum is σ = 1643621253120. Its totient is φ = 223528273920.

The previous prime is 668272625843. The next prime is 668272625861. The reversal of 668272625860 is 68526272866.

It is a junction number, because it is equal to n+sod(n) for n = 668272625795 and 668272625804.

It is not an unprimeable number, because it can be changed into a prime (668272625861) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 355652401 + ... + 355654279.

It is an arithmetic number, because the mean of its divisors is an integer number (8560527360).

Almost surely, 2^668272625860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668272625860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (821810626560).

668272625860 is an abundant number, since it is smaller than the sum of its proper divisors (975348627260).

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

668272625860 is a wasteful number, since it uses less digits than its factorization.

668272625860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2346 (or 2344 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 668272625860 in words is "six hundred sixty-eight billion, two hundred seventy-two million, six hundred twenty-five thousand, eight hundred sixty".