6655999960 has 64 divisors (see below), whose sum is σ = 15611032800. Its totient is φ = 2550912000.

The previous prime is 6655999943. The next prime is 6655999963. The reversal of 6655999960 is 699995566.

It is a junction number, because it is equal to n+sod(n) for n = 6655999892 and 6655999901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655999963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130060 + ... + 173860.

Almost surely, 2^6655999960 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 6655999960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7805516400).

6655999960 is an abundant number, since it is smaller than the sum of its proper divisors (8955032840).

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

6655999960 is a wasteful number, since it uses less digits than its factorization.

6655999960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43972 (or 43968 counting only the distinct ones).

The product of its (nonzero) digits is 35429400, while the sum is 64.

The square root of 6655999960 is about 81584.3119723394. The cubic root of 6655999960 is about 1881.0677464084.

The spelling of 6655999960 in words is "six billion, six hundred fifty-five million, nine hundred ninety-nine thousand, nine hundred sixty".