As an AI language model, I don't have access to real-time data, but according to the United Nations Department of Economic and Social Affairs, the estimated population of Europe as of 2021 is approximately 747 million people. However, this number may vary depending on the source and the methodology used to calculate it.

It is important to note that Europe is a continent consisting of 44 countries with different sizes, populations, and levels of development. Some of the most populous countries in Europe are Russia, Germany, the United Kingdom, France, Italy, and Spain. However, there are also smaller countries such as Iceland, Malta, and Andorra, with populations of less than 500,000 people.

The population of Europe has been increasing slowly over the years due to a combination of factors such as natural growth, migration, and aging. However, some countries are experiencing negative population growth, mainly due to low birth rates and emigration.

Overall, the population of Europe is diverse, with different ethnicities, cultures, and languages. This diversity has contributed to the richness and complexity of European societies, but it also poses challenges in terms of social cohesion and integration.