668271 has 8 divisors (see below), whose sum is σ = 895024. Its totient is φ = 443520.

The previous prime is 668243. The next prime is 668273. The reversal of 668271 is 172866.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-668271 is a prime.

It is a super-2 number, since 2×668271² = 893172258882, 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 (668273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681 + ... + 1341.

It is an arithmetic number, because the mean of its divisors is an integer number (111878).

2⁶⁶⁸²⁷¹ is an apocalyptic number.

668271 is a deficient number, since it is larger than the sum of its proper divisors (226753).

668271 is a wasteful number, since it uses less digits than its factorization.

668271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001.

The product of its digits is 4032, while the sum is 30.

The square root of 668271 is about 817.4784400827. The cubic root of 668271 is about 87.4280660492.

It can be divided in two parts, 668 and 271, that added together give a palindrome (939).

The spelling of 668271 in words is "six hundred sixty-eight thousand, two hundred seventy-one".