As character names:

U+17F8 KHMER SYMBOL LEK ATTAK PRAM-BEI character (៸)

As raw characters:

៸

As a string of HTML entities:

៸

Decoder output:

Byte number 1 is decimal 225, hex 0xE1, octal \341, binary 11100001
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 159, hex 0x9F, octal \237, binary 10011111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 184, hex 0xB8, octal \270, binary 10111000
This is continuation byte 2, expecting 0 more.

U+17F8	KHMER SYMBOL LEK ATTAK PRAM-BEI