6655603 has 2 divisors, whose sum is σ = 6655604. Its totient is φ = 6655602.

The previous prime is 6655591. The next prime is 6655631. The reversal of 6655603 is 3065566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6655603 - 2⁹ = 6655091 is a prime.

It is not a weakly prime, because it can be changed into another prime (6655633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3327801 + 3327802.

It is an arithmetic number, because the mean of its divisors is an integer number (3327802).

Almost surely, 2^6655603 is an apocalyptic number.

6655603 is a deficient number, since it is larger than the sum of its proper divisors (1).

6655603 is an equidigital number, since it uses as much as digits as its factorization.

6655603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 6655603 is about 2579.8455380119. The cubic root of 6655603 is about 188.1030350400.

The spelling of 6655603 in words is "six million, six hundred fifty-five thousand, six hundred three".