668793453 has 4 divisors (see below), whose sum is σ = 891724608. Its totient is φ = 445862300.

The previous prime is 668793427. The next prime is 668793487. The reversal of 668793453 is 354397866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 668793453 - 2¹⁰ = 668792429 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 668793396 and 668793405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668793493) 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, 111465573 + ... + 111465578.

It is an arithmetic number, because the mean of its divisors is an integer number (222931152).

Almost surely, 2^668793453 is an apocalyptic number.

It is an amenable number.

668793453 is a deficient number, since it is larger than the sum of its proper divisors (222931155).

668793453 is a wasteful number, since it uses less digits than its factorization.

668793453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222931154.

The product of its digits is 3265920, while the sum is 51.

The square root of 668793453 is about 25861.0412203376. The cubic root of 668793453 is about 874.5084381309.

The spelling of 668793453 in words is "six hundred sixty-eight million, seven hundred ninety-three thousand, four hundred fifty-three".