6557108220 has 384 divisors, whose sum is σ = 23482368000. Its totient is φ = 1506677760.

The previous prime is 6557108213. The next prime is 6557108231. The reversal of 6557108220 is 228017556.

It is a happy number.

6557108220 is a `hidden beast` number, since 6 + 5 + 571 + 0 + 82 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 127 ways as a sum of consecutive naturals, for example, 6310461 + ... + 6311499.

It is an arithmetic number, because the mean of its divisors is an integer number (61152000).

Almost surely, 2^6557108220 is an apocalyptic number.

6557108220 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 6557108220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11741184000).

6557108220 is an abundant number, since it is smaller than the sum of its proper divisors (16925259780).

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

6557108220 is a wasteful number, since it uses less digits than its factorization.

6557108220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130 (or 1122 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 6557108220 is about 80975.9731031372. The cubic root of 6557108220 is about 1871.7052153347.

The spelling of 6557108220 in words is "six billion, five hundred fifty-seven million, one hundred eight thousand, two hundred twenty".