668258734586 has 4 divisors (see below), whose sum is σ = 1002388101882. Its totient is φ = 334129367292.

The previous prime is 668258734573. The next prime is 668258734609. The reversal of 668258734586 is 685437852866.

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., 590016015625 + 78242718961 = 768125^2 + 279719^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167064683645 + ... + 167064683648.

Almost surely, 2^668258734586 is an apocalyptic number.

668258734586 is a deficient number, since it is larger than the sum of its proper divisors (334129367296).

668258734586 is a wasteful number, since it uses less digits than its factorization.

668258734586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334129367295.

The product of its digits is 464486400, while the sum is 68.

The spelling of 668258734586 in words is "six hundred sixty-eight billion, two hundred fifty-eight million, seven hundred thirty-four thousand, five hundred eighty-six".