668269 has 4 divisors (see below), whose sum is σ = 763744. Its totient is φ = 572796.

The previous prime is 668243. The next prime is 668273. The reversal of 668269 is 962866.

668269 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, and also an emirpimes, since its reverse is a distinct semiprime: 962866 = 2 ⋅481433.

It is not a de Polignac number, because 668269 - 2⁷ = 668141 is a prime.

It is a super-2 number, since 2×668269² = 893166912722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668209) 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, 47727 + ... + 47740.

It is an arithmetic number, because the mean of its divisors is an integer number (190936).

2⁶⁶⁸²⁶⁹ is an apocalyptic number.

It is an amenable number.

668269 is a deficient number, since it is larger than the sum of its proper divisors (95475).

668269 is an equidigital number, since it uses as much as digits as its factorization.

668269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95474.

The product of its digits is 31104, while the sum is 37.

The square root of 668269 is about 817.4772168079. The cubic root of 668269 is about 87.4279788309.

The spelling of 668269 in words is "six hundred sixty-eight thousand, two hundred sixty-nine".