668147741866 has 16 divisors (see below), whose sum is σ = 1093392266688. Its totient is φ = 303686964000.

The previous prime is 668147741827. The next prime is 668147741909.

It is a happy number.

668147741866 is nontrivially palindromic in base 10.

668147741866 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 = 668147741798 and 668147741807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410310 + ... + 1226641.

It is an arithmetic number, because the mean of its divisors is an integer number (68337016668).

Almost surely, 2^668147741866 is an apocalyptic number.

668147741866 is a deficient number, since it is larger than the sum of its proper divisors (425244524822).

668147741866 is a wasteful number, since it uses less digits than its factorization.

668147741866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655517.

The product of its digits is 65028096, while the sum is 64.

The spelling of 668147741866 in words is "six hundred sixty-eight billion, one hundred forty-seven million, seven hundred forty-one thousand, eight hundred sixty-six".