Back Ҳ. ҟ. 666 Abkhazian 666 ق م Arabic 666 ق م ARZ 666 e.C. AST 666 г. пр.н.е. Bulgarian 666 v. Chr. German 666 BC English -666 Esperanto ۶۶۶ (پیش از میلاد) Persian 666 f.Kr. Frisian
| Blianta RC: 669 RC 668 RC 667 RC - 666 RC - 665 RC 664 RC 663 RC | |
| deichniúra: 690idí RC 680idí RC 670idí RC - 660idí RC - 650idí RC 640idí RC 630idí RC | |
| Aois: 8ú haois RC - 7ú haois RC - 6ú haois RC | |