#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n;
  cin >> n;
  if (n < 3) {
    cout << n << 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;
  }
  return 0;
}
