6221708556 has 96 divisors (see below), whose sum is σ = 17476300800. Its totient is φ = 1720252800.

The previous prime is 6221708543. The next prime is 6221708561. The reversal of 6221708556 is 6558071226.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103216 + ... + 151976.

It is an arithmetic number, because the mean of its divisors is an integer number (182044800).

Almost surely, 2^6221708556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6221708556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8738150400).

6221708556 is an abundant number, since it is smaller than the sum of its proper divisors (11254592244).

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

6221708556 is a wasteful number, since it uses less digits than its factorization.

6221708556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48820 (or 48804 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 6221708556 is about 78877.8077535120. The cubic root of 6221708556 is about 1839.2321697841.

The spelling of 6221708556 in words is "six billion, two hundred twenty-one million, seven hundred eight thousand, five hundred fifty-six".