I don't believe there is a commonly used word for this specific arrangement in American English. If the separate units were single-family homes we would call them terraced houses (UK) or townhouses/rowhouses (US)—and it is true that in many cities such houses have been later subdivided so each house contains multiple apartments. But I don't think the term would be used to describe an apartment building that was designed as an apartment building from the start.
Two words that may be easily understood in context are:
5. A roughly cuboid building.
5. Any very tall building or structure; skyscraper.
6. (figuratively) Any item, such as a computer case, that is usually higher than it is wide.
So if you said Misha lives in the second block of my apartment building or Misha lives in the second tower of my apartment building that would be understandable, especially if the person you're talking to is already familiar with the concept of apartment buildings being separated into non-connected units.
Incidentally, the generic word unit would probably not be a good choice because in some countries "unit" means a specific apartment, such as "Unit 201" (which might be in the second "block" or on the second floor). So it would be confusing if you used it to describe a group of apartments—though, again, it could work if the context was clear.
But in the absence of a single word (such as close as @tkp suggested would be understood in Scotland) you can always describe what you mean:
Misha lives in the second set of apartments of my apartment building.