Fatto generale: 6371 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 6371 is a boring number.
Trivia: 6371 is a boring number.
Data storica: June 10th is the day in 1925 that Inaugural service for the United Church of Canada, a union of Presbyterian, Methodist, and Congregationalist churches, held in the Toronto Arena.