// in your Productos model declare a public property like so
public $productTotal;
$criteria = new CDbCriteria();
// make sure you count the products as productTotal
$criteria->select = 'COUNT(t.codigoProducto) as productTotal';
$criteria->with = [
'relacion1',
'relacion2'
];
$productos = Productos::model()->findAll($criteria);
// then you should be able to access it like so
echo $product->productTotal;