5555866 has 16 divisors (see below), whose sum is σ = 8820000. Its totient is φ = 2617488.

The previous prime is 5555863. The next prime is 5555873. The reversal of 5555866 is 6685555.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (5555861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10885 + ... + 11383.

It is an arithmetic number, because the mean of its divisors is an integer number (551250).

Almost surely, 2^5555866 is an apocalyptic number.

5555866 is a deficient number, since it is larger than the sum of its proper divisors (3264134).

5555866 is a wasteful number, since it uses less digits than its factorization.

5555866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813.

The product of its digits is 180000, while the sum is 40.

The square root of 5555866 is about 2357.0884582467. The cubic root of 5555866 is about 177.1130604335.

The spelling of 5555866 in words is "five million, five hundred fifty-five thousand, eight hundred sixty-six".