Objective-C: why int, double, char, etc.. does not require pointers to create an object from them

I'm new in objective-C and I have a question about pointers

I know when I want to store an address instead of a value I use pointers

and in order to get an address, I have to use the &variableName

in objective-C, in order to make an object, I have to do the following:

ClassName *theObject = [[ClassName alloc] init]; 

which means I'm storing the address of ClassName in the object theObject

which is the same idea as:

ClassName *theObject = &ClassName; //(Correct me if i'm wrong please); 

but my question is when I make an object of int, float, double, char I don't create the object as explained above, the only thing I do is:

int object = 7; 

why is it different in int, double, char, etc... ? they are not interfaces or what?