Weird that it's deadlocking on a page. Since you have the page address (5:1:1662692), it would be nice to see what the actual deadlocked resource is.

Print the page header with the following code, and report back what you see for the following values:

m_type

Metadata: IndexID

Here's the code:

DBCC TRACEON(3604);

DBCC PAGE(5, 1, 1662692);