What is Android 7.0 called?

Android “Nougat” (codenamed Android N during development) is the seventh major version and 14th original version of the Android operating system.

Is Android 6.0 still supported?

Android 6.0 Marshmallow was recently discontinued and Google is no longer updating it with security patches. Developers will still be able to pick a minimum API version and still make their apps compatible with Marshmallow but don’t expect it to be supported for too long. Android 6.0 is already 4 years old after all.