668367 has 18 divisors (see below), whose sum is σ = 1114152. Its totient is φ = 378216.

The previous prime is 668347. The next prime is 668407. The reversal of 668367 is 763866.

It is a happy number.

It is not a de Polignac number, because 668367 - 2⁶ = 668303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668347) 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 17 ways as a sum of consecutive naturals, for example, 6438 + ... + 6540.

2⁶⁶⁸³⁶⁷ is an apocalyptic number.

668367 is a deficient number, since it is larger than the sum of its proper divisors (445785).

668367 is a wasteful number, since it uses less digits than its factorization.

668367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 113 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 668367 is about 817.5371551190. The cubic root of 668367 is about 87.4322523212.

Multiplying 668367 by its product of digits (36288), we get a square (24253701696 = 155736²).

It can be divided in two parts, 668 and 367, that added together give a triangular number (1035 = T₄₅).

The spelling of 668367 in words is "six hundred sixty-eight thousand, three hundred sixty-seven".