As character names:

U+2786 DINGBAT CIRCLED SANS-SERIF DIGIT SEVEN character (➆)

As raw characters:

➆

As a string of HTML entities:

➆

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 158, hex 0x9E, octal \236, binary 10011110
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 134, hex 0x86, octal \206, binary 10000110
This is continuation byte 2, expecting 0 more.

U+2786	DINGBAT CIRCLED SANS-SERIF DIGIT SEVEN