Is there a free shuttle from macau airport to royal hotel

There are shuttle buses from the airport to the hotel, but they are not for free. The bus fare is 23 MOP per person.

is there a specific bus no and where is the location of the bus?

First of all, I wanna tell you that the shuttle buses are free for its guests from the airport to the hotel. But for the back trip, reservation is needed and it will be charged. I just know you can find the Royal Hotel shuttle bus counter at the arrival level, not clear about the exact location.