667533 has 4 divisors (see below), whose sum is σ = 890048. Its totient is φ = 445020.

The previous prime is 667531. The next prime is 667547. The reversal of 667533 is 335766.

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 not a de Polignac number, because 667533 - 2¹ = 667531 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 667533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111253 + ... + 111258.

It is an arithmetic number, because the mean of its divisors is an integer number (222512).

2⁶⁶⁷⁵³³ is an apocalyptic number.

It is an amenable number.

667533 is a deficient number, since it is larger than the sum of its proper divisors (222515).

667533 is a wasteful number, since it uses less digits than its factorization.

667533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222514.

The product of its digits is 11340, while the sum is 30.

The square root of 667533 is about 817.0269273408. The cubic root of 667533 is about 87.3958706880.

The spelling of 667533 in words is "six hundred sixty-seven thousand, five hundred thirty-three".