6555904 has 18 divisors (see below), whose sum is σ = 13086710. Its totient is φ = 3277824.

The previous prime is 6555839. The next prime is 6555907. The reversal of 6555904 is 4095556.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 2304 = 2560^2 + 48^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6555904.

It is not an unprimeable number, because it can be changed into a prime (6555907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12549 + ... + 13060.

Almost surely, 2^6555904 is an apocalyptic number.

6555904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6555904 is a deficient number, since it is larger than the sum of its proper divisors (6530806).

6555904 is an equidigital number, since it uses as much as digits as its factorization.

6555904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25625 (or 25611 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 6555904 is about 2560.4499604562. The cubic root of 6555904 is about 187.1590628092.

The spelling of 6555904 in words is "six million, five hundred fifty-five thousand, nine hundred four".