666833 has 4 divisors (see below), whose sum is σ = 671088. Its totient is φ = 662580.

The previous prime is 666829. The next prime is 666857. The reversal of 666833 is 338666.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 666833 - 2² = 666829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666833.

It is not an unprimeable number, because it can be changed into a prime (666823) 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, 1883 + ... + 2208.

It is an arithmetic number, because the mean of its divisors is an integer number (167772).

2⁶⁶⁶⁸³³ is an apocalyptic number.

It is an amenable number.

666833 is a deficient number, since it is larger than the sum of its proper divisors (4255).

666833 is a wasteful number, since it uses less digits than its factorization.

666833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4254.

The product of its digits is 15552, while the sum is 32.

The square root of 666833 is about 816.5984325236. The cubic root of 666833 is about 87.3653111470.

The spelling of 666833 in words is "six hundred sixty-six thousand, eight hundred thirty-three".