6659563855 has 16 divisors (see below), whose sum is σ = 9179020800. Its totient is φ = 4543605792.

The previous prime is 6659563843. The next prime is 6659563913. The reversal of 6659563855 is 5583659566.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6659563855 - 2¹³ = 6659555663 is a prime.

It is a super-2 number, since 2×6659563855² = 88699581477644922050, 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 6659563855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471109 + ... + 485038.

It is an arithmetic number, because the mean of its divisors is an integer number (573688800).

Almost surely, 2^6659563855 is an apocalyptic number.

6659563855 is a deficient number, since it is larger than the sum of its proper divisors (2519456945).

6659563855 is a wasteful number, since it uses less digits than its factorization.

6659563855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956358.

The product of its digits is 29160000, while the sum is 58.

The square root of 6659563855 is about 81606.1508404851. The cubic root of 6659563855 is about 1881.4034200770.

The spelling of 6659563855 in words is "six billion, six hundred fifty-nine million, five hundred sixty-three thousand, eight hundred fifty-five".