6622591536 has 320 divisors, whose sum is σ = 22277859840. Its totient is φ = 1861263360.

The previous prime is 6622591529. The next prime is 6622591537. The reversal of 6622591536 is 6351952266.

6622591536 is a `hidden beast` number, since 6 + 6 + 2 + 2 + 591 + 53 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 6622591491 and 6622591500.

It is not an unprimeable number, because it can be changed into a prime (6622591537) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5896671 + ... + 5897793.

It is an arithmetic number, because the mean of its divisors is an integer number (69618312).

Almost surely, 2^6622591536 is an apocalyptic number.

6622591536 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6622591536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11138929920).

6622591536 is an abundant number, since it is smaller than the sum of its proper divisors (15655268304).

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

6622591536 is a wasteful number, since it uses less digits than its factorization.

6622591536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1229 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 6622591536 is about 81379.3065588544. The cubic root of 6622591536 is about 1877.9152550844.

The spelling of 6622591536 in words is "six billion, six hundred twenty-two million, five hundred ninety-one thousand, five hundred thirty-six".