import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		long N = scan.nextLong();
		scan.close();
		if(N < 7) {
			System.out.println("NO");
		}else {
			if(numPrime(N) >= 2) {
				System.out.println("YES");
			}else {
				System.out.println("NO");
			}
		}

	}
	public static int numPrime(long n) {
		int cnt = 0;
		for(long i = 2; i <= (int)Math.sqrt(n); i++){
			if(n % i == 0) {
				cnt ++;
				if(n % (i * i) == 0 && n != i * i) {
					cnt ++;
				}
			}
		}

		return cnt;
	}
}