6664480992 has 144 divisors (see below), whose sum is σ = 20440667520. Its totient is φ = 2047527936.

The previous prime is 6664480957. The next prime is 6664480993. The reversal of 6664480992 is 2990844666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664480993) 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 23 ways as a sum of consecutive naturals, for example, 4630609 + ... + 4632047.

It is an arithmetic number, because the mean of its divisors is an integer number (141949080).

Almost surely, 2^6664480992 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 6664480992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10220333760).

6664480992 is an abundant number, since it is smaller than the sum of its proper divisors (13776186528).

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

6664480992 is a wasteful number, since it uses less digits than its factorization.

6664480992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705 (or 2694 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The square root of 6664480992 is about 81636.2725263715. The cubic root of 6664480992 is about 1881.8663554196.

The spelling of 6664480992 in words is "six billion, six hundred sixty-four million, four hundred eighty thousand, nine hundred ninety-two".