668437 has 8 divisors (see below), whose sum is σ = 833472. Its totient is φ = 520800.

The previous prime is 668417. The next prime is 668471. The reversal of 668437 is 734866.

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-668437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 668437.

It is not an unprimeable number, because it can be changed into a prime (668407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4264 + ... + 4417.

It is an arithmetic number, because the mean of its divisors is an integer number (104184).

2⁶⁶⁸⁴³⁷ is an apocalyptic number.

It is an amenable number.

668437 is a deficient number, since it is larger than the sum of its proper divisors (165035).

668437 is a wasteful number, since it uses less digits than its factorization.

668437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8699.

The product of its digits is 24192, while the sum is 34.

The square root of 668437 is about 817.5799655080. The cubic root of 668437 is about 87.4353045585.

The spelling of 668437 in words is "six hundred sixty-eight thousand, four hundred thirty-seven".