668536603 has 16 divisors (see below), whose sum is σ = 804989440. Its totient is φ = 542376000.

The previous prime is 668536597. The next prime is 668536613. The reversal of 668536603 is 306635866.

It is a cyclic number.

It is not a de Polignac number, because 668536603 - 2²⁹ = 131665691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 668536603.

It is not an unprimeable number, because it can be changed into a prime (668536613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238138 + ... + 240928.

It is an arithmetic number, because the mean of its divisors is an integer number (50311840).

Almost surely, 2^668536603 is an apocalyptic number.

668536603 is a deficient number, since it is larger than the sum of its proper divisors (136452837).

668536603 is a wasteful number, since it uses less digits than its factorization.

668536603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4618.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 668536603 is about 25856.0747794401. The cubic root of 668536603 is about 874.3964721957.

The spelling of 668536603 in words is "six hundred sixty-eight million, five hundred thirty-six thousand, six hundred three".