The Atmosphere Cube per Human

The mass of Earth's atmosphere is about 5.148 × 10^18 kg (NASA/NOAA standard
value). If we divide this by the current human population (~8.12 × 10^9 people, late
2025), we get roughly 6.34 × 10^8 kg of air per person. At sea level, 1 m^3 of air
has a mass of about 1.225 kg, so this corresponds to roughly 5.18 × 10^8 m^3 of
air per person.
The cube root of this volume is about 804 m. In other words, purely in terms of mass,
each human today could be associated with an idealised cube of atmosphere
roughly 804 × 804 × 804 metres in size. This is, of course, only a thought
experiment, but it gives us a geometric intuition.