If i used viber with my father's number but now my fathers uses it will he be able to see my chats?

I used to use my fathers number for my viber in my phone i didn't deleted the number but abandoned it now my father is using that number for his viber in his phone, so i wanted to ask will my father be able to see all those old contacts and numbers and chat that i used to chat with in my phone ? will he able to see it in his viber in his phone now??