How I send Numbers file to my iPhone via bluetooth and view it on iPhone

iOS devices such as iPhones do not have the BT profile for file transfer. What you are trying to do is not possible. Perhaps you can email it.

You cannot do file exchange with an iPhone using BlueTooth; the only BlueTooth profiles supported are for hands-free devices and tethering.

You use other protocols for file exchange with an iPhone, such as WiFi or syncing via cable or WiFi with iTunes.

This is from the iPhone Manual.  You might be able to share the file without Bluetooth.  Indeed iPhone does support .numbers files:

File sharing

File Sharing lets you transfer files with a USB cable between iPhone and your computer, using iTunes. You can share files created with a compatible app and saved in a supported format.

Apps that support file sharing appear in the File Sharing Apps list in iTunes. For each app, the Files list shows the documents that are on iPhone. See the app’s documentation for information about how it shares files; not all apps support this feature.

Transfer a file from iPhone to your computer: In iTunes, go to your device’s Apps pane. In the File Sharing section, select an app from the list. On the right, select the file you want to transfer, then click “Save to.”

Transfer a file from your computer to iPhone: In iTunes, go to your device’s Apps pane. In the File Sharing section, select an app, then click Add. The file is immediately transferred to your device for use with the app you selected.

Delete a file from iPhone: In iTunes, go to your device’s Apps pane. In the File Sharing section, select the file, then press the Delete key.