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