668237 has 4 divisors (see below), whose sum is σ = 671616. Its totient is φ = 664860.

The previous prime is 668221. The next prime is 668243. The reversal of 668237 is 732866.

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: 732866 = 2 ⋅366433.

It is a cyclic number.

It is not a de Polignac number, because 668237 - 2⁴ = 668221 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 668237.

It is not an unprimeable number, because it can be changed into a prime (668737) 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, 1373 + ... + 1794.

It is an arithmetic number, because the mean of its divisors is an integer number (167904).

2⁶⁶⁸²³⁷ is an apocalyptic number.

It is an amenable number.

668237 is a deficient number, since it is larger than the sum of its proper divisors (3379).

668237 is a wasteful number, since it uses less digits than its factorization.

668237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378.

The product of its digits is 12096, while the sum is 32.

The square root of 668237 is about 817.4576441627. The cubic root of 668237 is about 87.4265833151.

The spelling of 668237 in words is "six hundred sixty-eight thousand, two hundred thirty-seven".