Fatto matematico: 678 is a member of the Fibonacci-type sequence starting with 1 and 7.
Trivia: 678 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: November 8th is the day in 1745 that Charles Edward Stuart invades England with an army of ~5000 that would later participate in the Battle of Culloden.