668167 has 4 divisors (see below), whose sum is σ = 672336. Its totient is φ = 664000.

The previous prime is 668159. The next prime is 668179. The reversal of 668167 is 761866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668167 - 2³ = 668159 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 (668567) 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, 1834 + ... + 2167.

It is an arithmetic number, because the mean of its divisors is an integer number (168084).

2⁶⁶⁸¹⁶⁷ is an apocalyptic number.

668167 is a deficient number, since it is larger than the sum of its proper divisors (4169).

668167 is a wasteful number, since it uses less digits than its factorization.

668167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168.

The product of its digits is 12096, while the sum is 34.

The square root of 668167 is about 817.4148273674. The cubic root of 668167 is about 87.4235304688.

It can be divided in two parts, 668 and 167, that multiplied together give a square (111556 = 334²).

The spelling of 668167 in words is "six hundred sixty-eight thousand, one hundred sixty-seven".