Figured-bass numeral 6 with a stroke through it, meaning a raised sixth above the bass note.
U+1D1F9MUSICAL SYMBOL DIGIT FIVE WITH STROKEU+1D1FBMUSICAL SYMBOL DIGIT SEVEN WITH STROKEU+1D1F8MUSICAL SYMBOL DIGIT FOUR WITH STROKEU+1D1FCMUSICAL SYMBOL DIGIT NINE WITH STROKEU+1D1F7MUSICAL SYMBOL DIGIT TWO WITH STROKEU+1D1FDMUSICAL SYMBOL DIGIT FIVE WITH LOW STROKEU+1D1F6MUSICAL SYMBOL REVERSED FLAT AND FLAT DOWNU+1D1FEMUSICAL SYMBOL DIGIT SEVEN WITH LOW STROKEU+1D1F5MUSICAL SYMBOL REVERSED FLAT AND FLAT UPU+1D1FFMUSICAL SYMBOL LONGA RESTU+1D1F4MUSICAL SYMBOL REVERSED FLAT DOWNU+1D1F3MUSICAL SYMBOL REVERSED FLAT UP256 characters in the Musical Symbols Unicode block, from number 251.