668281213714 has 4 divisors (see below), whose sum is σ = 1002421820574. Its totient is φ = 334140606856.

The previous prime is 668281213687. The next prime is 668281213729. The reversal of 668281213714 is 417312182866.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 344387054025 + 323894159689 = 586845^2 + 569117^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167070303427 + ... + 167070303430.

Almost surely, 2^668281213714 is an apocalyptic number.

668281213714 is a deficient number, since it is larger than the sum of its proper divisors (334140606860).

668281213714 is a wasteful number, since it uses less digits than its factorization.

668281213714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334140606859.

The product of its digits is 774144, while the sum is 49.

The spelling of 668281213714 in words is "six hundred sixty-eight billion, two hundred eighty-one million, two hundred thirteen thousand, seven hundred fourteen".