6611555555 has 12 divisors (see below), whose sum is σ = 8720697216. Its totient is φ = 4808403600.

The previous prime is 6611555539. The next prime is 6611555563. The reversal of 6611555555 is 5555551166.

It is not a de Polignac number, because 6611555555 - 2⁴ = 6611555539 is a prime.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5463491 + ... + 5464700.

It is an arithmetic number, because the mean of its divisors is an integer number (726724768).

Almost surely, 2^6611555555 is an apocalyptic number.

6611555555 is a deficient number, since it is larger than the sum of its proper divisors (2109141661).

6611555555 is a wasteful number, since it uses less digits than its factorization.

6611555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10928218 (or 10928207 counting only the distinct ones).

The product of its digits is 562500, while the sum is 44.

The square root of 6611555555 is about 81311.4724685269. The cubic root of 6611555555 is about 1876.8715468635.

The spelling of 6611555555 in words is "six billion, six hundred eleven million, five hundred fifty-five thousand, five hundred fifty-five".