6556352220 has 240 divisors, whose sum is σ = 22674583008. Its totient is φ = 1572618240.

The previous prime is 6556352213. The next prime is 6556352261. The reversal of 6556352220 is 222536556.

6556352220 is a `hidden beast` number, since 6 + 55 + 63 + 522 + 20 = 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 polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1726644 + ... + 1730436.

Almost surely, 2^6556352220 is an apocalyptic number.

6556352220 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 6556352220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11337291504).

6556352220 is an abundant number, since it is smaller than the sum of its proper divisors (16118230788).

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

6556352220 is a wasteful number, since it uses less digits than its factorization.

6556352220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922 (or 3911 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 6556352220 is about 80971.3049172360. The cubic root of 6556352220 is about 1871.6332799896.

Adding to 6556352220 its reverse (222536556), we get a palindrome (6778888776).

The spelling of 6556352220 in words is "six billion, five hundred fifty-six million, three hundred fifty-two thousand, two hundred twenty".