6663369888 has 144 divisors (see below), whose sum is σ = 21690789120. Its totient is φ = 1900758528.

The previous prime is 6663369871. The next prime is 6663369917. The reversal of 6663369888 is 8889633666.

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

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1447206 + ... + 1451802.

It is an arithmetic number, because the mean of its divisors is an integer number (150630480).

Almost surely, 2^6663369888 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 6663369888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10845394560).

6663369888 is an abundant number, since it is smaller than the sum of its proper divisors (15027419232).

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

6663369888 is a wasteful number, since it uses less digits than its factorization.

6663369888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5339 (or 5328 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 63.

The square root of 6663369888 is about 81629.4670324387. The cubic root of 6663369888 is about 1881.7617678581.

The spelling of 6663369888 in words is "six billion, six hundred sixty-three million, three hundred sixty-nine thousand, eight hundred eighty-eight".