6663420064 has 48 divisors (see below), whose sum is σ = 15044012928. Its totient is φ = 2845976832.

The previous prime is 6663420041. The next prime is 6663420089. The reversal of 6663420064 is 4600243666.

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, 14869 + ... + 116395.

It is an arithmetic number, because the mean of its divisors is an integer number (313416936).

Almost surely, 2^6663420064 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 6663420064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7522006464).

6663420064 is an abundant number, since it is smaller than the sum of its proper divisors (8380592864).

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

6663420064 is a wasteful number, since it uses less digits than its factorization.

6663420064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101837 (or 101829 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 37.

The square root of 6663420064 is about 81629.7743718553. The cubic root of 6663420064 is about 1881.7664911459.

The spelling of 6663420064 in words is "six billion, six hundred sixty-three million, four hundred twenty thousand, sixty-four".