6655885566 has 64 divisors (see below), whose sum is σ = 15130976256. Its totient is φ = 1933567200.

The previous prime is 6655885547. The next prime is 6655885627.

6655885566 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a zygodrome in base 10.

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 31 ways as a sum of consecutive naturals, for example, 203721 + ... + 234123.

It is an arithmetic number, because the mean of its divisors is an integer number (236421504).

Almost surely, 2^6655885566 is an apocalyptic number.

6655885566 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6655885566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7565488128).

6655885566 is an abundant number, since it is smaller than the sum of its proper divisors (8475090690).

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

6655885566 is a wasteful number, since it uses less digits than its factorization.

6655885566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30557.

The product of its digits is 51840000, while the sum is 60.

The square root of 6655885566 is about 81583.6108909136. The cubic root of 6655885566 is about 1881.0569699612.

The spelling of 6655885566 in words is "six billion, six hundred fifty-five million, eight hundred eighty-five thousand, five hundred sixty-six".