#include <bits/stdc++.h>
using namespace std;
const double pi = 3.14159265359;
int MAX = 1000000000;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(NULL);
  cout.tie(NULL);
  long long n;
  cin >> n;
  if (n < 3)
    cout << n;
  else if (n % 2 != 0)
    cout << n * (n - 1) * (n - 2);
  else if (n % 3 == 0)
    cout << (n - 1) * (n - 2) * (n - 3);
  else
    cout << n * (n - 1) * (n - 3);
  return 0;
}
