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