6600556240 has 80 divisors (see below), whose sum is σ = 15641405136. Its totient is φ = 2589696000.

The previous prime is 6600556231. The next prime is 6600556247. The reversal of 6600556240 is 426550066.

It can be written as a sum of positive squares in 8 ways, for example, as 617224336 + 5983331904 = 24844^2 + 77352^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 6600556196 and 6600556205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6600556247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955194 + ... + 1958566.

Almost surely, 2^6600556240 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 6600556240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7820702568).

6600556240 is an abundant number, since it is smaller than the sum of its proper divisors (9040848896).

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

6600556240 is a wasteful number, since it uses less digits than its factorization.

6600556240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848 (or 3842 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 6600556240 is about 81243.8073947793. The cubic root of 6600556240 is about 1875.8301499700.

The spelling of 6600556240 in words is "six billion, six hundred million, five hundred fifty-six thousand, two hundred forty".