6221663888 has 40 divisors (see below), whose sum is σ = 13155887136. Its totient is φ = 2826835200.

The previous prime is 6221663887. The next prime is 6221663911. The reversal of 6221663888 is 8883661226.

It is not an unprimeable number, because it can be changed into a prime (6221663887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513743 + ... + 525713.

Almost surely, 2^6221663888 is an apocalyptic number.

It is an amenable number.

6221663888 is an abundant number, since it is smaller than the sum of its proper divisors (6934223248).

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

6221663888 is a wasteful number, since it uses less digits than its factorization.

6221663888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14943 (or 14937 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 50.

The square root of 6221663888 is about 78877.5246061893. The cubic root of 6221663888 is about 1839.2277682590.

The spelling of 6221663888 in words is "six billion, two hundred twenty-one million, six hundred sixty-three thousand, eight hundred eighty-eight".