Has an Olympic Basketball (Men) game ever ended 68-66?
Exactly once. On July 28, 1952, France beat Uruguay 68-66, and no Olympic Basketball (Men) game before or since has ended that way. When it happened it was a scorigami, the first 68-66 in league history.
That makes 68-66 the 126th most common final score out of 698 that have ever occurred in Olympic Basketball (Men). One point away, 69-66 has happened never and 68-67 has happened never.