8219566722 has 8 divisors (see below), whose sum is σ = 16439133456. Its totient is φ = 2739855572.

The previous prime is 8219566709. The next prime is 8219566781. The reversal of 8219566722 is 2276659128.

It is a sphenic number, since it is the product of 3 distinct primes.

8219566722 is an admirable number.

It is a super-2 number, since 2×8219566722² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684963888 + ... + 684963899.

It is an arithmetic number, because the mean of its divisors is an integer number (2054891682).

Almost surely, 2^8219566722 is an apocalyptic number.

8219566722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8219566722 is a wasteful number, since it uses less digits than its factorization.

8219566722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369927792.

The product of its digits is 725760, while the sum is 48.

The square root of 8219566722 is about 90661.8261563267. The cubic root of 8219566722 is about 2018.1323391729.

The spelling of 8219566722 in words is "eight billion, two hundred nineteen million, five hundred sixty-six thousand, seven hundred twenty-two".