5556666555 has 32 divisors (see below), whose sum is σ = 10776568320. Its totient is φ = 2694140640.

The previous prime is 5556666523. The next prime is 5556666607.

5556666555 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5556666555 - 2⁵ = 5556666523 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 31 ways as a sum of consecutive naturals, for example, 1869447 + ... + 1872416.

It is an arithmetic number, because the mean of its divisors is an integer number (336767760).

Almost surely, 2^5556666555 is an apocalyptic number.

5556666555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5556666555 is a deficient number, since it is larger than the sum of its proper divisors (5219901765).

5556666555 is a wasteful number, since it uses less digits than its factorization.

5556666555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741888 (or 3741882 counting only the distinct ones).

The product of its digits is 20250000, while the sum is 54.

The square root of 5556666555 is about 74543.0516882694. The cubic root of 5556666555 is about 1771.2156687433.

The spelling of 5556666555 in words is "five billion, five hundred fifty-six million, six hundred sixty-six thousand, five hundred fifty-five".