6555555 has 12 divisors (see below), whose sum is σ = 11363040. Its totient is φ = 3496272.

The previous prime is 6555547. The next prime is 6555581. The reversal of 6555555 is 5555556.

It is not a de Polignac number, because 6555555 - 2³ = 6555547 is a prime.

6555555 is a modest number, since divided by 5555 gives 655 as remainder.

It is a nialpdrome 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, 72795 + ... + 72884.

It is an arithmetic number, because the mean of its divisors is an integer number (946920).

Almost surely, 2^6555555 is an apocalyptic number.

6555555 is a deficient number, since it is larger than the sum of its proper divisors (4807485).

6555555 is a wasteful number, since it uses less digits than its factorization.

6555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145690 (or 145687 counting only the distinct ones).

The product of its digits is 93750, while the sum is 36.

The square root of 6555555 is about 2560.3818074654. The cubic root of 6555555 is about 187.1557416465.

Subtracting from 6555555 its reverse (5555556), we obtain a palindrome (999999).

The spelling of 6555555 in words is "six million, five hundred fifty-five thousand, five hundred fifty-five".