668753543 has 16 divisors (see below), whose sum is σ = 723340800. Its totient is φ = 616381920.

The previous prime is 668753537. The next prime is 668753573. The reversal of 668753543 is 345357866.

It is a cyclic number.

It is not a de Polignac number, because 668753543 - 2⁶ = 668753479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668753573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612428 + ... + 613518.

It is an arithmetic number, because the mean of its divisors is an integer number (45208800).

Almost surely, 2^668753543 is an apocalyptic number.

668753543 is a deficient number, since it is larger than the sum of its proper divisors (54587257).

668753543 is a wasteful number, since it uses less digits than its factorization.

668753543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062.

The product of its digits is 1814400, while the sum is 47.

The square root of 668753543 is about 25860.2695848284. The cubic root of 668753543 is about 874.4910424632.

The spelling of 668753543 in words is "six hundred sixty-eight million, seven hundred fifty-three thousand, five hundred forty-three".