U+1D7DE "𝟞" Mathematical Double-Struck Digit Six Unicode Character
Unicode Version 17.0
𝟞
U+1D7DE "𝟞" Mathematical Double-Struck Digit Six is a stylized numeral from the "Mathematical Alphanumeric Symbols" block, designed to resemble a bold "six" with a double-struck or open-face appearance, commonly used in mathematical notation to denote a blackboard bold digit. It is specifically intended for use in contexts where a distinct, typographically separate representation of the number six is needed, such as in set theory, algebraic systems, or other formal mathematical writing. This character helps avoid confusion with standard digits and aligns with the visual conventions of mathematical typesetting, particularly when working with numeric structures like the natural numbers in a double-struck style.
General Properties
| Code Point | U+1D7DE |
| Version Added | 3.1 |
| Name | Mathematical Double-Struck Digit Six |
| Block | Mathematical Alphanumeric Symbols |
| General Category | Decimal Number |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | European Number |
| Decomposition Type | Font |
| Decomposition Mapping | "6" U+0036 Digit Six |
Encodings
| HTML Decimal Encoding | 𝟞 |
| HTML Hex Encoding | 𝟞 |
| UTF-8 Encoding | 0xF0 0x9D 0x9F 0x9E |
| UTF-16 Encoding | 0xD835 0xDFDE |
| UTF-32 Encoding | 0x0001D7DE |
| C/C++/Java Escape | \ud835\udfde |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | Decimal |
| Numeric Value | 6 |
| Line Break | Numeric |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "6" U+0036 Digit Six |
| NFKC Simple Casefold | "6" U+0036 Digit Six |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| ID Continue | Yes |
| XID Continue | Yes |
| Math | Yes |
| Other Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Numeric |
| Sentence Break | Numeric |