my phone was stolen and they somehow changed the trusted number and password for my apple id..can i still access it

Read this document if you think your Apple ID has been compromised. --> If you think your Apple ID has been compromised - Apple Support

For iOS 15 or earlier, if you want to see if anyone else has access to your device or accounts, click here --> See who has access to your iPhone or iPad - Apple Support

For iOS 16 or later see how Safety Check on iPhone works to keep you safe. How Safety Check on iPhone works to keep you safe - Apple Support

Use the information in this document to check your Apple ID device list to find where you're signed in --> Check your Apple ID device list to find where you're signed in - Apple Support

Related materials:

Personal Safety User Guide

Personal Safety User Guide - Apple Support

> open the Table of Contents and review the articles

A document with general information about security and your Apple ID --> Security and your Apple ID - Apple Support

Contact Apple for help with Apple ID account security. This page provides country-specific Apple Support contact information ➞ Contact Apple for support and service - Apple Support

shira2744 wrote:

they changed the trusted phone number and my Apple ID Password

Can you still access it? No.

If your passcode was observed or otherwise became known, this sequence is fairly typical for professional thieves.

That iPhone is effectively no longer yours.

That Apple ID is also no longer yours.

While it is unlikely, you might still be able to recover the Apple ID: https://iforgot.apple.com/

Though it won’t help here, stolen device protection can help reduce the exposure to these thefts, but that feature requires iOS 17, and requires explicitly enabling it. It won’t help here.