The Coptic Epact Numbers block spans U+102E0–U+102FF, 32 codepoints in Plane 1 (Supplementary Multilingual Plane). 28 are assigned in Unicode 16.0; the other 4 are reserved for future characters.
By script: Common (27), Inherited (1).
By general category: 27 other numbers (No), 1 non-spacing marks (Mn).
The first 28 arrived in Unicode 7.0 (2014).
Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.