6656603 has 2 divisors, whose sum is σ = 6656604. Its totient is φ = 6656602.

The previous prime is 6656597. The next prime is 6656621. The reversal of 6656603 is 3066566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6656603 - 2⁶ = 6656539 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6656603.

It is not a weakly prime, because it can be changed into another prime (6656623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328301 + 3328302.

It is an arithmetic number, because the mean of its divisors is an integer number (3328302).

Almost surely, 2^6656603 is an apocalyptic number.

6656603 is a deficient number, since it is larger than the sum of its proper divisors (1).

6656603 is an equidigital number, since it uses as much as digits as its factorization.

6656603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 6656603 is about 2580.0393407853. The cubic root of 6656603 is about 188.1124553542.

The spelling of 6656603 in words is "six million, six hundred fifty-six thousand, six hundred three".