Well, first thing is that it wouldn't be in dollars because Brazil has its own currency units.
Depending on the bill's date it could easily be genuine. From 1980 to 1994 Brazil suffered from a long stretch of inflation that became so severe that prices went up almost every day. The link below documents just how much and how fast prices rose.
Real
There is no such thing as a real million dollar bill, the largest dollar bill is a $100000 note, a gold seal note to be exact. However, there are pranks bills that are a "million dollars"
1.6572 Brazilian Reals (BRL) is equal to 1 US Dollar.
67%
Brazilian's currency is Real and the value isn't very stable because of the crise so the value of the money is very different although the US dollar is worth about double than Real
Real
There is no such thing as a real million dollar bill, the largest dollar bill is a $100000 note, a gold seal note to be exact. However, there are pranks bills that are a "million dollars"
There is no such thing as the Brazilian Dollar. Brazil's currency is the Real (plural: Reais). The woman in the Brazilian Real is physical representation of the Republic.
There's no such thing as a "brazilian dollar". The Brazilian currency is called "Real" (R$). 1 Real is weaker than 1 dollar. The exchange rate changes daily.
1 Brazilian Real = 0.43177 US Dollar 1 US Dollar (USD) = 2.31607 Brazilian Real (BRL) Median price = 0.43056 / 0.43177 (bid/ask) Minimum price = 0.42105 / 0.42977 Maximum price = 0.43309 / 0.43956 (www.onlineconversion.com)
The Portuguese word for "dollar" is "dólar" The Brazilian unit of currency that is the functional equivalent of the dollar in the US is the Real. As of February 2014, one Brazilian Real is worth about 0.42 US Dollars
$1 in American money is equal to that of 2.42 Brazilian Real. 2.42 Brazilian Real would be equal to 6655 mil cruzados.
One Brazilian Real is equal to almost 25 cents in the U.S. currency 1 Brazilian Real = 0,51 US Dollar (currency of May 21st, 2007)
1.6572 Brazilian Reals (BRL) is equal to 1 US Dollar.
67%
Brazilian currency is the Real. The "cruzeiro" was a former currency. I don't know the current rate for the Real, something like 1.8 reais for one dollar.
Brazilian's currency is Real and the value isn't very stable because of the crise so the value of the money is very different although the US dollar is worth about double than Real