As far as I understand, you had said phone number ending in that 60.
We can also assume that you have closed the SIM card tied to said number.
Phone companies usually keep "already used" numbers in stand-by pool for few months, not reusing them, thus you should be quite safe.
In theory, if someone was to get that number and knew it used to be yours, then supposedly they could prevent the number-change from occurring and thus practically take over the account.
Now.. however, if you don't use sites that need the SMS security code that is sent to the number ending in 60, said person using said phone number (99% likely no one, they hold used numbers in said pool for a reason) will not get a security code or notice or anything about what is going on.
As said, unless person who gets said number, knows it's yours and knows your other details too and wants to take over your account, you are pretty much safe.