I think any one can not give answer for this question but yes can say millions of restaurants in each city.In whole world how many restaurants are there this is too difficult to say .
How Many Restaurants Are In The World?
Lol, a trillion?? I hope those two are joking, that would mean every person on earth would have to own 166 restaurants, @ 6 billion peeps. There give or take 400,000 in the USA. As for other countries.... No idea