#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

signed main(){
  ll N; cin >> N;
  for( int i = 2; 1LL * i * i <= N; ++i )
    if( N % i == 0 ){
      for( int j = 2; 1LL * j * j <= N / i; ++j )
        if( N / i % j == 0 )
          cout << "YES" << endl, exit( 0 );
      break;
    }
  cout << "NO" << endl;
  return 0;
}