That can't be right for all addresses, my list of all Bitcoin addresses ever used is 16 GB compressed.
Out of curiosity... how many addresses are in your list of all addresses ever used? 
I've just run the create-address-db.py script... and it came up with 793,722,051 unique addresses (as at ~block# 674206)Some interesting (?) statistics (updated until blockchair_bitcoin_outputs_20200719.tsv.gz)
Unique address count: 693,180,830
1... address count: 470,943,308
3... address count: 167,941,821
bc1q... address count: 39,137,878
...-... (with a "dash") weird address count: 15,157,808
That makes your current number plausible.Unique address count: 693,180,830
1... address count: 470,943,308
3... address count: 167,941,821
bc1q... address count: 39,137,878
...-... (with a "dash") weird address count: 15,157,808
I'm starting to think gzip compression does a terrible job at compressing Bitcoin addresses.