The following are data types available in Dynamics 365.
Single Line of Text
Defaults to 100 length. Max length is 4000.
IME Mode (relevant for Chinese, Japanese and Korean users):
-2,147,483,648 and 2,147,483,647
Floating Point Number
Up to 5 decimal points, between -100,000,000,000 and -100,000,000,000
Up to 10 decimal points, between -100,000,000,000 and -100,000,000,000
Between -922,337,203,685,477 and 922,337,203,685,477
Multiple Lines of Text
Up to 1,048,576 characters
Date and Time
Target Record Type
Introduced in Microsoft Dynamics CRM 2016 SP1 and Microsoft Dynamics CRM Online 2016 Update 1.