668315210444 has 24 divisors (see below), whose sum is σ = 1338144208128. Its totient is φ = 286096421520.

The previous prime is 668315210419. The next prime is 668315210447. The reversal of 668315210444 is 444012513866.

668315210444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 668315210395 and 668315210404.

It is not an unprimeable number, because it can be changed into a prime (668315210447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13490792 + ... + 13540239.

It is an arithmetic number, because the mean of its divisors is an integer number (55756008672).

Almost surely, 2^668315210444 is an apocalyptic number.

It is an amenable number.

668315210444 is an abundant number, since it is smaller than the sum of its proper divisors (669828997684).

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

668315210444 is a wasteful number, since it uses less digits than its factorization.

668315210444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27031925 (or 27031923 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 668315210444 in words is "six hundred sixty-eight billion, three hundred fifteen million, two hundred ten thousand, four hundred forty-four".