6656615055 has 24 divisors (see below), whose sum is σ = 11849977152. Its totient is φ = 3454242624.

The previous prime is 6656615051. The next prime is 6656615101. The reversal of 6656615055 is 5505166566.

6656615055 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6656615055 - 2² = 6656615051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6656615055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656615051) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1997319 + ... + 2000648.

It is an arithmetic number, because the mean of its divisors is an integer number (493749048).

Almost surely, 2^6656615055 is an apocalyptic number.

6656615055 is a deficient number, since it is larger than the sum of its proper divisors (5193362097).

6656615055 is a wasteful number, since it uses less digits than its factorization.

6656615055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998015 (or 3998012 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The square root of 6656615055 is about 81588.0815744555. The cubic root of 6656615055 is about 1881.1256891034.

Subtracting from 6656615055 its reverse (5505166566), we obtain a square (1151448489 = 33933²).

The spelling of 6656615055 in words is "six billion, six hundred fifty-six million, six hundred fifteen thousand, fifty-five".