668773 has 4 divisors (see below), whose sum is σ = 764320. Its totient is φ = 573228.

The previous prime is 668761. The next prime is 668791. The reversal of 668773 is 377866.

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: 377866 = 2 ⋅188933.

It is a cyclic number.

It is not a de Polignac number, because 668773 - 2⁵ = 668741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668713) 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, 47763 + ... + 47776.

It is an arithmetic number, because the mean of its divisors is an integer number (191080).

2⁶⁶⁸⁷⁷³ is an apocalyptic number.

It is an amenable number.

668773 is a deficient number, since it is larger than the sum of its proper divisors (95547).

668773 is an equidigital number, since it uses as much as digits as its factorization.

668773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95546.

The product of its digits is 42336, while the sum is 37.

The square root of 668773 is about 817.7854241792. The cubic root of 668773 is about 87.4499523319.

It can be divided in two parts, 668 and 773, that added together give a palindrome (1441).

The spelling of 668773 in words is "six hundred sixty-eight thousand, seven hundred seventy-three".