507 (number)
From Tardis Wiki, the free Doctor Who reference
507 was a number.
According to a census, the English village of Hexen Bridge had a population of 507 people in 1895 which slightly declined over the years before rising back to 507 in 1919 in spite of the great flu. (PROSE: The Hollow Men [+]Loading...["The Hollow Men (novel)"])
The Eleventh Doctor once claimed to Clyde Langer that he could regenerate 507 times. (TV: Death of the Doctor [+]Loading...["Death of the Doctor (TV story)"])