6663039240 has 256 divisors, whose sum is σ = 23685177600. Its totient is φ = 1490565120.

The previous prime is 6663039221. The next prime is 6663039241. The reversal of 6663039240 is 429303666.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (6663039241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2074756 + ... + 2077964.

It is an arithmetic number, because the mean of its divisors is an integer number (92520225).

Almost surely, 2^6663039240 is an apocalyptic number.

6663039240 is a gapful number since it is divisible by the number (60) 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 6663039240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11842588800).

6663039240 is an abundant number, since it is smaller than the sum of its proper divisors (17022138360).

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

6663039240 is a wasteful number, since it uses less digits than its factorization.

6663039240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269 (or 3243 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 39.

The square root of 6663039240 is about 81627.4417092683. The cubic root of 6663039240 is about 1881.7306419130.

The spelling of 6663039240 in words is "six billion, six hundred sixty-three million, thirty-nine thousand, two hundred forty".