667240 has 32 divisors (see below), whose sum is σ = 1716480. Its totient is φ = 228672.

The previous prime is 667229. The next prime is 667241. The reversal of 667240 is 42766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667241) by changing a digit.

667240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912 + ... + 1471.

It is an arithmetic number, because the mean of its divisors is an integer number (53640).

2⁶⁶⁷²⁴⁰ is an apocalyptic number.

It is an amenable number.

667240 is an abundant number, since it is smaller than the sum of its proper divisors (1049240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667240 is a wasteful number, since it uses less digits than its factorization.

667240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401 (or 2397 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 667240 is about 816.8475990049. The cubic root of 667240 is about 87.3830819382.

The spelling of 667240 in words is "six hundred sixty-seven thousand, two hundred forty".