668028260242 has 32 divisors (see below), whose sum is σ = 1205774945280. Its totient is φ = 271159675920.

The previous prime is 668028260231. The next prime is 668028260243. The reversal of 668028260242 is 242062820866.

668028260242 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 = 668028260192 and 668028260201.

It is not an unprimeable number, because it can be changed into a prime (668028260243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 717867 + ... + 1360657.

It is an arithmetic number, because the mean of its divisors is an integer number (37680467040).

Almost surely, 2^668028260242 is an apocalyptic number.

668028260242 is a deficient number, since it is larger than the sum of its proper divisors (537746685038).

668028260242 is a wasteful number, since it uses less digits than its factorization.

668028260242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646726.

The product of its (nonzero) digits is 884736, while the sum is 46.

The spelling of 668028260242 in words is "six hundred sixty-eight billion, twenty-eight million, two hundred sixty thousand, two hundred forty-two".