673566 has 8 divisors (see below), whose sum is σ = 1347144. Its totient is φ = 224520.

The previous prime is 673553. The next prime is 673567. The reversal of 673566 is 665376.

673566 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.

673566 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673567) by changing a digit.

673566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56125 + ... + 56136.

It is an arithmetic number, because the mean of its divisors is an integer number (168393).

2⁶⁷³⁵⁶⁶ is an apocalyptic number.

673566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673566 is a wasteful number, since it uses less digits than its factorization.

673566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112266.

The product of its digits is 22680, while the sum is 33.

The square root of 673566 is about 820.7106676533. The cubic root of 673566 is about 87.6583689725.

The spelling of 673566 in words is "six hundred seventy-three thousand, five hundred sixty-six".