#include <iostream>

using namespace std;

int main()
{int n;
cin>>n;

    if (n=4||n=7||n=44||n=47||n=444||n=447||n=74||n=477||n=74||n=77||n=777||n=774||n=747||n=74||n=474)
    cout << "YES" << endl;

    else
        cout<<"NO";
    return 0;
}