Has a FIBA World Cup game ever ended 73-62?
Exactly once. On February 25, 2018, Venezuela beat Colombia 73-62, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 73-62 in league history.
That makes 73-62 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 74-62 has happened never and 73-63 has happened 5 times.