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