6663543120 has 480 divisors, whose sum is σ = 25192387584. Its totient is φ = 1567641600.

The previous prime is 6663543109. The next prime is 6663543169. The reversal of 6663543120 is 213453666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24588585 + ... + 24588855.

Almost surely, 2^6663543120 is an apocalyptic number.

6663543120 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 6663543120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12596193792).

6663543120 is an abundant number, since it is smaller than the sum of its proper divisors (18528844464).

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

6663543120 is a wasteful number, since it uses less digits than its factorization.

6663543120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 6663543120 is about 81630.5281129554. The cubic root of 6663543120 is about 1881.7780748487.

6663543120 divided by its sum of digits (36) gives a triangular number (185098420 = T₁₉₂₄₀).

Adding to 6663543120 its reverse (213453666), we get a palindrome (6876996786).

The spelling of 6663543120 in words is "six billion, six hundred sixty-three million, five hundred forty-three thousand, one hundred twenty".