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