668134747334 has 32 divisors (see below), whose sum is σ = 1039412736000. Its totient is φ = 321897552480.

The previous prime is 668134747321. The next prime is 668134747363. The reversal of 668134747334 is 433747431866.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 668134747334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4661267 + ... + 4802465.

It is an arithmetic number, because the mean of its divisors is an integer number (32481648000).

Almost surely, 2^668134747334 is an apocalyptic number.

668134747334 is a deficient number, since it is larger than the sum of its proper divisors (371277988666).

668134747334 is a wasteful number, since it uses less digits than its factorization.

668134747334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142028.

The product of its digits is 24385536, while the sum is 56.

The spelling of 668134747334 in words is "six hundred sixty-eight billion, one hundred thirty-four million, seven hundred forty-seven thousand, three hundred thirty-four".