This character is a Other Punctuation and is commonly used, that is, in no specific script.
The glyph is a small version of the glyph Reverse Solidus. Its East Asian Width is wide. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+FE68 offers a line break opportunity at its position, except in some numeric contexts. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
The backslash is a mark used mainly in computing and mathematics. It is the mirror image of the common slash /. It is a relatively recent mark, first documented in the 1930s. It is sometimes called a hack, whack, escape (from C/UNIX), reverse slash, slosh, downwhack, backslant, backwhack, bash, reverse slant, reverse solidus, and reversed virgule.
Representations
System
Representation (click value to copy)
Nº
65128
UTF-8
EF B9 A8
UTF-16
FE 68
UTF-32
00 00 FE 68
URL-Quoted
%EF%B9%A8
HTML hex reference
﹨
Wrong windows-1252 Mojibake
﹨
Encoding: CP950 (hex bytes)
A2 42
Encoding: GBK (hex bytes)
A9 85
Encoding: GB18030 (hex bytes)
A9 85
RFC 5137
\u'FE68'
Bash and Zsh inside echo -e
\uFE68
C and C++
\uFE68
C#
\uFE68
CSS
\00FE68
Excel
=UNICHAR(65128)
Go
\uFE68
JavaScript
\uFE68
Modern JavaScript since ES6
\u{fe68}
JSON
\uFE68
Java
\uFE68
Lua
\u{FE68}
Matlab
char(65128)
Perl
"\x{FE68}"
PHP
\u{fe68}
PostgreSQL
U&'\FE68'
PowerShell
`u{FE68}
Python
\uFE68
Ruby
\u{fe68}
Rust
\u{fe68}
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