6609997555200 has 720 divisors, whose sum is σ = 26973632702016. Its totient is φ = 1531360051200.

The previous prime is 6609997555193. The next prime is 6609997555229. The reversal of 6609997555200 is 25557999066.

6609997555200 is a `hidden beast` number, since 6 + 6 + 0 + 9 + 9 + 9 + 75 + 552 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 25329385 + ... + 25589015.

Almost surely, 2^{6609997555200} is an apocalyptic number.

6609997555200 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 6609997555200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13486816351008).

6609997555200 is an abundant number, since it is smaller than the sum of its proper divisors (20363635146816).

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

6609997555200 is a wasteful number, since it uses less digits than its factorization.

6609997555200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259695 (or 259671 counting only the distinct ones).

The product of its (nonzero) digits is 45927000, while the sum is 63.

The spelling of 6609997555200 in words is "six trillion, six hundred nine billion, nine hundred ninety-seven million, five hundred fifty-five thousand, two hundred".