Heroic Effort #66
| Series | X-Factor |
| Number | Vol. 1 #66 |
| Publisher | Marvel Comics |
| Date | 1991-05 |
| Type | Comic Book, Softcover |
| Language | English |
| Colorist | Steve Buccellato, Glynis Oliver* |
| Editor | Bob Harras |
| Editor In Chief | Tom DeFalco |
| Inker | Art Thibert |
| Letterer | Pat Brousseau* |
| Penciler | Whilce Portacio |
| Writer | Chris Claremont |
| Genre | Superhero |
| Published in | US |
| Pages | 36 |
| Characters | Apocalypse |
| Notes | Bonus Feature: The Apocalypse Files |
Added by arbakol