6665111200 has 144 divisors (see below), whose sum is σ = 17928540000. Its totient is φ = 2399360000.

The previous prime is 6665111177. The next prime is 6665111207. The reversal of 6665111200 is 21115666.

It is not an unprimeable number, because it can be changed into a prime (6665111207) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 885051 + ... + 892549.

It is an arithmetic number, because the mean of its divisors is an integer number (124503750).

Almost surely, 2^6665111200 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 6665111200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8964270000).

6665111200 is an abundant number, since it is smaller than the sum of its proper divisors (11263428800).

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

6665111200 is a wasteful number, since it uses less digits than its factorization.

6665111200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7631 (or 7618 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 6665111200 is about 81640.1322879869. The cubic root of 6665111200 is about 1881.9256713590.

Adding to 6665111200 its reverse (21115666), we get a palindrome (6686226866).

The spelling of 6665111200 in words is "six billion, six hundred sixty-five million, one hundred eleven thousand, two hundred".