| Centuries: | 6th century · 7th century · 8th century |
| Decades: | 630s 640s 650s 660s 670s 680s 690s |
| Years: | 664 665 666 667 668 669 670 |
| 667 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 667 DCLXVII |
| Ab urbe condita | 1420 |
| Armenian calendar | 116 ԹՎ ՃԺԶ |
| Bahá'í calendar | -1177 – -1176 |
| Bengali calendar | 74 |
| Berber calendar | 1617 |
| Buddhist calendar | 1211 |
| Burmese calendar | 29 |
| Byzantine calendar | 6175 – 6176 |
| Chinese calendar | 丙寅年十二月初二日 (3303/3363-12-2) — to —
丁卯年十二月十一日(3304/3364-12-11) |
| Coptic calendar | 383 – 384 |
| Ethiopian calendar | 659 – 660 |
| Hebrew calendar | 4427 – 4428 |
| Hindu calendars | |
| - Bikram Samwat | 723 – 724 |
| - Shaka Samvat | 589 – 590 |
| - Kali Yuga | 3768 – 3769 |
| Holocene calendar | 10667 |
| Iranian calendar | 45 – 46 |
| Islamic calendar | 46 – 47 |
| Japanese calendar | |
| Korean calendar | 3000 |
| Thai solar calendar | 1210 |