6655488840 has 1152 divisors, whose sum is σ = 30952696320. Its totient is φ = 1204346880.

The previous prime is 6655488799. The next prime is 6655488857. The reversal of 6655488840 is 488845566.

6655488840 is a `hidden beast` number, since 6 + 6 + 554 + 8 + 8 + 84 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 91171044 + ... + 91171116.

It is an arithmetic number, because the mean of its divisors is an integer number (26868660).

Almost surely, 2^6655488840 is an apocalyptic number.

6655488840 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 6655488840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15476348160).

6655488840 is an abundant number, since it is smaller than the sum of its proper divisors (24297207480).

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

6655488840 is a wasteful number, since it uses less digits than its factorization.

6655488840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 54.

The square root of 6655488840 is about 81581.1794472230. The cubic root of 6655488840 is about 1881.0195955689.

The spelling of 6655488840 in words is "six billion, six hundred fifty-five million, four hundred eighty-eight thousand, eight hundred forty".