6660264400 has 60 divisors (see below), whose sum is σ = 16052709292. Its totient is φ = 2655544320.

The previous prime is 6660264379. The next prime is 6660264407. The reversal of 6660264400 is 44620666.

It can be written as a sum of positive squares in 6 ways, for example, as 972691344 + 5687573056 = 31188^2 + 75416^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660264407) 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 11 ways as a sum of consecutive naturals, for example, 98602 + ... + 151798.

Almost surely, 2^6660264400 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 6660264400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8026354646).

6660264400 is an abundant number, since it is smaller than the sum of its proper divisors (9392444892).

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

6660264400 is a wasteful number, since it uses less digits than its factorization.

6660264400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53528 (or 53517 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 6660264400 is about 81610.4429592194. The cubic root of 6660264400 is about 1881.4693884384.

The spelling of 6660264400 in words is "six billion, six hundred sixty million, two hundred sixty-four thousand, four hundred".