668098334786 has 4 divisors (see below), whose sum is σ = 1002147502182. Its totient is φ = 334049167392.

The previous prime is 668098334753. The next prime is 668098334791. The reversal of 668098334786 is 687433890866.

It is a happy number.

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., 495806098225 + 172292236561 = 704135^2 + 415081^2 .

It is a super-2 number, since 2×668098334786² (a number of 24 digits) contains 22 as substring.

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, 167024583695 + ... + 167024583698.

Almost surely, 2^668098334786 is an apocalyptic number.

668098334786 is a deficient number, since it is larger than the sum of its proper divisors (334049167396).

668098334786 is a wasteful number, since it uses less digits than its factorization.

668098334786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334049167395.

The product of its (nonzero) digits is 250822656, while the sum is 68.

The spelling of 668098334786 in words is "six hundred sixty-eight billion, ninety-eight million, three hundred thirty-four thousand, seven hundred eighty-six".