667982 has 8 divisors (see below), whose sum is σ = 1145136. Its totient is φ = 286272.

The previous prime is 667963. The next prime is 667987. The reversal of 667982 is 289766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667987) 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, 23843 + ... + 23870.

It is an arithmetic number, because the mean of its divisors is an integer number (143142).

2⁶⁶⁷⁹⁸² is an apocalyptic number.

667982 is a deficient number, since it is larger than the sum of its proper divisors (477154).

667982 is a wasteful number, since it uses less digits than its factorization.

667982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47722.

The product of its digits is 36288, while the sum is 38.

The square root of 667982 is about 817.3016578963. The cubic root of 667982 is about 87.4154612056.

The spelling of 667982 in words is "six hundred sixty-seven thousand, nine hundred eighty-two".