Has an AFL game ever ended 66-47?
Exactly once. On September 3, 1994, Hawthorn beat Adelaide 66-47, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 66-47 in league history.
That makes 66-47 the 3884th most common final score out of 6,649 that have ever occurred in AFL. One point away, 67-47 has happened 4 times and 66-48 has happened 5 times.