Wow! I worked at Google circa 2015 and there was an internal web page showing how many employees there were. My recollection is that there were about 50k full-time employees and 50k TVCs then. Even then, it felt crazy how large and incohesive the organisation was. I wonder what it's like now.
I joined end of 2011 and I think there were just north of 20,000 FTEs.
When I left end of last year I had been there longer than 95%+ of the 100k+ (I forget) employees, which I found ... odd... since I still felt like a Noogler.