#include <bits/stdc++.h>
using namespace std;
int n;
int main() {
  ios::sync_with_stdio(false);
  cin >> n;
  if (n == 1)
    cout << n << endl;
  else if (n == 2)
    cout << n << endl;
  else if (n == 3)
    cout << 6 << endl;
  else if (n == 4)
    cout << 12 << endl;
  else {
    if (n & 1)
      cout << 1ll * n * (n - 1) * (n - 2) << endl;
    else if (n % 3 == 0)
      cout << 1ll * (n - 1) * (n - 2) * (n - 3) << endl;
    else
      cout << 1ll * n * (n - 1) * (n - 3) << endl;
  }
  return 0;
}
