MathDB

Connor is thinking of a two-digit number

n

, which satisfies the following properties:
[*] If

n>70

, then

n

is a perfect square. [*] If

n>40

, then

n

is prime. [*] If

n<80

, then the sum of the digits of

n

14

.
What is Connor's number?
Proposed by Connor Gordon

1