I received a reminder of 9559850 to pay the electricity bill. The reminder information has nothing to do with me and I don’t know it at all. Has my phone number been stolen? what to do

Probably not. It is possible that the previous director of this number bound the electricity bill account but did not unbind it, so the message was sent to your mobile phone. If it has nothing to do with you, just ignore it. I used to have a number like this. Notifications of bank card arrival and water and electricity payment information were sent to my number without any attention. Later I changed my number.