When a number is added, subtracted and divided by itself, the sum of its sum, difference and quotient is 11.66. What is the number?

When a number is added, subtracted and divided by itself, the sum of its sum, difference and quotient is 11.66. What is the number?

(11.66-1) △ 2 = 10.66 △ 2 = 5.33. A: this number is 5.33