The soccer World Cup is the worlds most prestigious association football tournament, as well as the most widely viewed and followed single sporting event. The cumulative viewership of all 2006 World Cup matches was estimated to be 26.29 billion, with an estimated 715.1 million people watching the final match, accounting for oneninth of the worlds population. Twentyone final tournaments have been held as of the 2018 FIFA World Cup, with a total of 79 national teams competing. Eight national teams have won the trophy. Brazil has won five times and is the only team to have participated in every tournament.