8205399566 has 48 divisors (see below), whose sum is σ = 15431762304. Its totient is φ = 3243393216.

The previous prime is 8205399533. The next prime is 8205399611. The reversal of 8205399566 is 6659935028.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2320736 + ... + 2324268.

It is an arithmetic number, because the mean of its divisors is an integer number (321495048).

Almost surely, 2^8205399566 is an apocalyptic number.

8205399566 is a deficient number, since it is larger than the sum of its proper divisors (7226362738).

8205399566 is a wasteful number, since it uses less digits than its factorization.

8205399566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5385 (or 5378 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 53.

The square root of 8205399566 is about 90583.6605906385. The cubic root of 8205399566 is about 2016.9721953809.

The spelling of 8205399566 in words is "eight billion, two hundred five million, three hundred ninety-nine thousand, five hundred sixty-six".