667573 has 8 divisors (see below), whose sum is σ = 715392. Its totient is φ = 620736.

The previous prime is 667561. The next prime is 667577. The reversal of 667573 is 375766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667573 is a prime.

It is a Duffinian number.

667573 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667577) 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, 1636 + ... + 2002.

It is an arithmetic number, because the mean of its divisors is an integer number (89424).

2⁶⁶⁷⁵⁷³ is an apocalyptic number.

It is an amenable number.

667573 is a deficient number, since it is larger than the sum of its proper divisors (47819).

667573 is a wasteful number, since it uses less digits than its factorization.

667573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491.

The product of its digits is 26460, while the sum is 34.

The square root of 667573 is about 817.0514059715. The cubic root of 667573 is about 87.3976163020.

The spelling of 667573 in words is "six hundred sixty-seven thousand, five hundred seventy-three".