8221727566 has 16 divisors (see below), whose sum is σ = 13418176464. Its totient is φ = 3755522304.

The previous prime is 8221727551. The next prime is 8221727573. The reversal of 8221727566 is 6657271228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1627480 + ... + 1632523.

It is an arithmetic number, because the mean of its divisors is an integer number (838636029).

Almost surely, 2^8221727566 is an apocalyptic number.

8221727566 is a deficient number, since it is larger than the sum of its proper divisors (5196448898).

8221727566 is a wasteful number, since it uses less digits than its factorization.

8221727566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260115.

The product of its digits is 564480, while the sum is 46.

The square root of 8221727566 is about 90673.7424285554. The cubic root of 8221727566 is about 2018.3091727870.

The spelling of 8221727566 in words is "eight billion, two hundred twenty-one million, seven hundred twenty-seven thousand, five hundred sixty-six".