I think this is kind of useless information unless presented with other spheres for humans, structures, animals, plants, forests etc. for comparison. And ants.
I had no idea where to start. ChatGPT had a rather impressive looking “proof of work” that put all living humans into a 976m-diameter sphere, compared to the ~1384km-diameter sphere. Ie ~1km human sphere and 1,384km water sphere.
https://www.wolframalpha.com/input?i=estimated+total+volume+...
Which has a link that gives us the radius.
https://www.wolframalpha.com/input?i=4.73%C3%9710%5E8+cubic+...