#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, l;
  cin >> n;
  if (n < 3)
    cout << n;
  else if (n % 2 != 0)
    cout << n * (n - 1) * (n - 2);
  else if (n % 6 == 0)
    cout << (n - 1) * (n - 2) * (n - 3);
  else
    cout << n * (n - 1) * (n - 3);
}
