667983 has 8 divisors (see below), whose sum is σ = 937600. Its totient is φ = 421848.

The previous prime is 667963. The next prime is 667987. The reversal of 667983 is 389766.

667983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 667983 - 2⁸ = 667727 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 5803 + ... + 5916.

It is an arithmetic number, because the mean of its divisors is an integer number (117200).

2⁶⁶⁷⁹⁸³ is an apocalyptic number.

667983 is a deficient number, since it is larger than the sum of its proper divisors (269617).

667983 is a wasteful number, since it uses less digits than its factorization.

667983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11741.

The product of its digits is 54432, while the sum is 39.

The square root of 667983 is about 817.3022696653. The cubic root of 667983 is about 87.4155048273.

The spelling of 667983 in words is "six hundred sixty-seven thousand, nine hundred eighty-three".