imc

Since $-5>-2015$, the product must end with a $5$. The multiplicands are the odd negative integers from $-1$ to $-2013$. There are $\frac{|-2013+1|}{2}+1=1006+1$ of these numbers. Since $(-1{)}^{1007}=-1$, the product is negative. Therefore, the answer must be $\boxed{\text{It is a negative number ending with a 5.}}$ Alternatively, we can calculate the units digit of each group of 5 odd numbers using modular arithmetic.