668051256830 has 16 divisors (see below), whose sum is σ = 1213730509680. Its totient is φ = 264723114432.

The previous prime is 668051256811. The next prime is 668051256853. The reversal of 668051256830 is 38652150866.

It is a congruent number.

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, 312172415 + ... + 312174554.

It is an arithmetic number, because the mean of its divisors is an integer number (75858156855).

Almost surely, 2^668051256830 is an apocalyptic number.

668051256830 is a deficient number, since it is larger than the sum of its proper divisors (545679252850).

668051256830 is a wasteful number, since it uses less digits than its factorization.

668051256830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624347083.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 668051256830 in words is "six hundred sixty-eight billion, fifty-one million, two hundred fifty-six thousand, eight hundred thirty".