6555561055 has 4 divisors (see below), whose sum is σ = 7866673272. Its totient is φ = 5244448840.

The previous prime is 6555561049. The next prime is 6555561059. The reversal of 6555561055 is 5501655556.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6555561055 - 2²⁹ = 6018690143 is a prime.

It is a super-3 number, since 3×6555561055³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6555561059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655556101 + ... + 655556110.

It is an arithmetic number, because the mean of its divisors is an integer number (1966668318).

Almost surely, 2^6555561055 is an apocalyptic number.

6555561055 is a deficient number, since it is larger than the sum of its proper divisors (1311112217).

6555561055 is a wasteful number, since it uses less digits than its factorization.

6555561055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311112216.

The product of its (nonzero) digits is 562500, while the sum is 43.

The square root of 6555561055 is about 80966.4193045487. The cubic root of 6555561055 is about 1871.5579926825.

The spelling of 6555561055 in words is "six billion, five hundred fifty-five million, five hundred sixty-one thousand, fifty-five".