668353 has 4 divisors (see below), whose sum is σ = 763840. Its totient is φ = 572868.

The previous prime is 668347. The next prime is 668407. The reversal of 668353 is 353866.

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, and also an emirpimes, since its reverse is a distinct semiprime: 353866 = 2 ⋅176933.

It is a cyclic number.

It is not a de Polignac number, because 668353 - 2¹⁷ = 537281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668303) 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, 47733 + ... + 47746.

It is an arithmetic number, because the mean of its divisors is an integer number (190960).

2⁶⁶⁸³⁵³ is an apocalyptic number.

It is an amenable number.

668353 is a deficient number, since it is larger than the sum of its proper divisors (95487).

668353 is an equidigital number, since it uses as much as digits as its factorization.

668353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95486.

The product of its digits is 12960, while the sum is 31.

The square root of 668353 is about 817.5285927721. The cubic root of 668353 is about 87.4316418482.

The spelling of 668353 in words is "six hundred sixty-eight thousand, three hundred fifty-three".