6665324544 has 96 divisors (see below), whose sum is σ = 19744452000. Its totient is φ = 2221756416.

The previous prime is 6665324527. The next prime is 6665324569. The reversal of 6665324544 is 4454235666.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 6665324544.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4974 + ... + 115565.

It is an arithmetic number, because the mean of its divisors is an integer number (205671375).

Almost surely, 2^6665324544 is an apocalyptic number.

6665324544 is a gapful number since it is divisible by the number (64) 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 6665324544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9872226000).

6665324544 is an abundant number, since it is smaller than the sum of its proper divisors (13079127456).

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

6665324544 is a wasteful number, since it uses less digits than its factorization.

6665324544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120570 (or 120544 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 45.

The square root of 6665324544 is about 81641.4388898187. The cubic root of 6665324544 is about 1881.9457507072.

The spelling of 6665324544 in words is "six billion, six hundred sixty-five million, three hundred twenty-four thousand, five hundred forty-four".