668814874082 has 4 divisors (see below), whose sum is σ = 1003222311126. Its totient is φ = 334407437040.

The previous prime is 668814874069. The next prime is 668814874103. The reversal of 668814874082 is 280478418866.

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., 447358984801 + 221455889281 = 668849^2 + 470591^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167203718519 + ... + 167203718522.

Almost surely, 2^668814874082 is an apocalyptic number.

668814874082 is a deficient number, since it is larger than the sum of its proper divisors (334407437044).

668814874082 is a wasteful number, since it uses less digits than its factorization.

668814874082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334407437043.

The product of its (nonzero) digits is 33030144, while the sum is 62.

The spelling of 668814874082 in words is "six hundred sixty-eight billion, eight hundred fourteen million, eight hundred seventy-four thousand, eighty-two".