What 𝟞 means
It is a double-struck six, not a special value by itself.
Blackboard forms were written with doubled strokes on classroom boards; Unicode's reference drawing echoes that simpler handwriting. Fonts may vary the outline or lack the glyph.
A mathematical notation style; in ordinary prose it looks intentionally styled.
For a plain text six, use formatting; this character may behave differently in search and text tools.
Don't confuse it with
4𝟘𝟙𝟚𝟛
Mathematical Double-Struck Digit Zero
shares “digit”, “double”, “mathematical”, “struck”
Mathematical Double-Struck Digit One
shares “digit”, “double”, “mathematical”, “struck”
Mathematical Double-Struck Digit Two
shares “digit”, “double”, “mathematical”, “struck”
Mathematical Double-Struck Digit Three
shares “digit”, “double”, “mathematical”, “struck”
Questions people ask
1Can Unicode normalization turn 𝟞 into 6?
Yes. NFKC/NFKD compatibility normalization can fold it to plain 6; NFC/NFD preserve its styled form.
How to type 𝟞
Windows (Word)
Alt+XType 1D7DE, then Alt+X to get 𝟞.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “mathematical double-struck digit six”.
Linux
Ctrl+Shift+UType 1d7de, then Enter or Space.
HTML
𝟞CSS
\1D7DEMicrosoft Word
Type 1D7DE in Word, then press Alt+X. If adjacent text interferes, select only the code first.
Codes and encoding1 code points
HTML decimal
𝟞
HTML hex
𝟞
CSS content
content: "\1D7DE";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%F0%9D%9F%9E
1
On screen
1
Code points
2
JS .length
4
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.