6659825856 has 112 divisors (see below), whose sum is σ = 17981676000. Its totient is φ = 2174943232.

The previous prime is 6659825839. The next prime is 6659825863. The reversal of 6659825856 is 6585289566.

It is a super-2 number, since 2×6659825856² = 88706560864492265472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6659825856.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1929220 + ... + 1932668.

Almost surely, 2^6659825856 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 6659825856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8990838000).

6659825856 is an abundant number, since it is smaller than the sum of its proper divisors (11321850144).

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

6659825856 is a wasteful number, since it uses less digits than its factorization.

6659825856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666 (or 3656 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 60.

The square root of 6659825856 is about 81607.7561019784. The cubic root of 6659825856 is about 1881.4280925192.

The spelling of 6659825856 in words is "six billion, six hundred fifty-nine million, eight hundred twenty-five thousand, eight hundred fifty-six".