Has an AFL game ever ended 66-27?
Exactly once. On May 26, 1900, Fitzroy beat Melbourne 66-27, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 66-27 in league history.
That makes 66-27 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 67-27 has happened 1 times and 66-28 has happened 2 times.