6551603 has 2 divisors, whose sum is σ = 6551604. Its totient is φ = 6551602.

The previous prime is 6551591. The next prime is 6551639. The reversal of 6551603 is 3061556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6551603 - 2¹⁴ = 6535219 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (6551653) 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, 3275801 + 3275802.

It is an arithmetic number, because the mean of its divisors is an integer number (3275802).

Almost surely, 2^6551603 is an apocalyptic number.

6551603 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551603 is an equidigital number, since it uses as much as digits as its factorization.

6551603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 6551603 is about 2559.6099312200. The cubic root of 6551603 is about 187.1181252956.

The spelling of 6551603 in words is "six million, five hundred fifty-one thousand, six hundred three".