using System;
namespace ConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            ulong N = ulong.Parse(Console.ReadLine());
            ulong count = 0;
            for (ulong i = 2; i * i < N; i++)
            {
                while(N % i == 0)
                {
                    count++;
                    N /= i;
                }
            }
            if(N != 1)
            {
                count++;
            }
            if (count > 2)
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }
        }
    }
}