6605398800 has 1440 divisors, whose sum is σ = 32415068160. Its totient is φ = 1240012800.

The previous prime is 6605398769. The next prime is 6605398843. The reversal of 6605398800 is 88935066.

6605398800 is a `hidden beast` number, since 6 + 605 + 39 + 8 + 8 + 0 + 0 = 666.

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

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, 140540377 + ... + 140540423.

It is an arithmetic number, because the mean of its divisors is an integer number (22510464).

Almost surely, 2^6605398800 is an apocalyptic number.

6605398800 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 6605398800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16207534080).

6605398800 is an abundant number, since it is smaller than the sum of its proper divisors (25809669360).

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

6605398800 is a wasteful number, since it uses less digits than its factorization.

6605398800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 6605398800 is about 81273.6045712260. The cubic root of 6605398800 is about 1876.2887779578.

The spelling of 6605398800 in words is "six billion, six hundred five million, three hundred ninety-eight thousand, eight hundred".