Valid Apple phone number

Based on a web search, it appears fraud may be involved with that number. If you are looking at something purporting to be an Apple bill, check your account at Apple and confirm the charges exist at Apple.

Here are details on Apple bills`, and how to verify charges from Apple:

… If you see 'apple.com/bill' on your billing statement - Apple Support

Here are some of the common scams:

… Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Is this about receiving calls from Apple?

Did you schedule a call from Apple?

The official Apple Support numbers are listed on this Apple page:

Contact Apple for support and service - Apple Support

This also seems to be a scam:

APPLE.COM/BILL 866-712-7753 !!SCAM!! - Apple Community