668793 has 4 divisors (see below), whose sum is σ = 891728. Its totient is φ = 445860.

The previous prime is 668791. The next prime is 668803. The reversal of 668793 is 397866.

668793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 668793 - 2¹ = 668791 is a prime.

It is a d-powerful number, because it can be written as 6 + 6 + 7⁶ + 8 + 9⁶ + 3⁹ .

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668791) 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, 111463 + ... + 111468.

It is an arithmetic number, because the mean of its divisors is an integer number (222932).

2⁶⁶⁸⁷⁹³ is an apocalyptic number.

It is an amenable number.

668793 is a deficient number, since it is larger than the sum of its proper divisors (222935).

668793 is a wasteful number, since it uses less digits than its factorization.

668793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222934.

The product of its digits is 54432, while the sum is 39.

The square root of 668793 is about 817.7976522343. The cubic root of 668793 is about 87.4508240685.

The spelling of 668793 in words is "six hundred sixty-eight thousand, seven hundred ninety-three".