6622756920 has 384 divisors, whose sum is σ = 24153292800. Its totient is φ = 1562803200.

The previous prime is 6622756897. The next prime is 6622756927. The reversal of 6622756920 is 296572266.

6622756920 is a `hidden beast` number, since 6 + 62 + 2 + 7 + 569 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6622756927) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27710161 + ... + 27710399.

It is an arithmetic number, because the mean of its divisors is an integer number (62899200).

Almost surely, 2^6622756920 is an apocalyptic number.

6622756920 is a gapful number since it is divisible by the number (60) 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 6622756920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12076646400).

6622756920 is an abundant number, since it is smaller than the sum of its proper divisors (17530535880).

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

6622756920 is a wasteful number, since it uses less digits than its factorization.

6622756920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 6622756920 is about 81380.3226830663. The cubic root of 6622756920 is about 1877.9308871598.

The spelling of 6622756920 in words is "six billion, six hundred twenty-two million, seven hundred fifty-six thousand, nine hundred twenty".