668754686603 has 4 divisors (see below), whose sum is σ = 678173766768. Its totient is φ = 659335606440.

The previous prime is 668754686599. The next prime is 668754686657. The reversal of 668754686603 is 306686457866.

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 668754686603 - 2² = 668754686599 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 668754686603.

It is not an unprimeable number, because it can be changed into a prime (668754686693) 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, 4709539976 + ... + 4709540117.

It is an arithmetic number, because the mean of its divisors is an integer number (169543441692).

Almost surely, 2^668754686603 is an apocalyptic number.

668754686603 is a deficient number, since it is larger than the sum of its proper divisors (9419080165).

668754686603 is an equidigital number, since it uses as much as digits as its factorization.

668754686603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9419080164.

The product of its (nonzero) digits is 209018880, while the sum is 65.

The spelling of 668754686603 in words is "six hundred sixty-eight billion, seven hundred fifty-four million, six hundred eighty-six thousand, six hundred three".