6664004550 has 144 divisors (see below), whose sum is σ = 20937945600. Its totient is φ = 1487747520.

The previous prime is 6664004533. The next prime is 6664004551. The reversal of 6664004550 is 554004666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664004551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 110851 + ... + 160049.

It is an arithmetic number, because the mean of its divisors is an integer number (145402400).

Almost surely, 2^6664004550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6664004550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10468972800).

6664004550 is an abundant number, since it is smaller than the sum of its proper divisors (14273941050).

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

6664004550 is a wasteful number, since it uses less digits than its factorization.

6664004550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49267 (or 49259 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 6664004550 is about 81633.3543963495. The cubic root of 6664004550 is about 1881.8215096400.

The spelling of 6664004550 in words is "six billion, six hundred sixty-four million, four thousand, five hundred fifty".