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