668735603 has 4 divisors (see below), whose sum is σ = 697811088. Its totient is φ = 639660120.

The previous prime is 668735597. The next prime is 668735611. The reversal of 668735603 is 306537866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668735603 - 2⁶ = 668735539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668735633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14537708 + ... + 14537753.

It is an arithmetic number, because the mean of its divisors is an integer number (174452772).

Almost surely, 2^668735603 is an apocalyptic number.

668735603 is a deficient number, since it is larger than the sum of its proper divisors (29075485).

668735603 is a wasteful number, since it uses less digits than its factorization.

668735603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29075484.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 668735603 is about 25859.9227183687. The cubic root of 668735603 is about 874.4832226868.

The spelling of 668735603 in words is "six hundred sixty-eight million, seven hundred thirty-five thousand, six hundred three".