667565 has 8 divisors (see below), whose sum is σ = 843360. Its totient is φ = 505872.

The previous prime is 667561. The next prime is 667577. The reversal of 667565 is 565766.

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

It is a cyclic number.

It is not a de Polignac number, because 667565 - 2² = 667561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667561) 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, 3419 + ... + 3608.

It is an arithmetic number, because the mean of its divisors is an integer number (105420).

2⁶⁶⁷⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

667565 is a deficient number, since it is larger than the sum of its proper divisors (175795).

667565 is a wasteful number, since it uses less digits than its factorization.

667565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051.

The product of its digits is 37800, while the sum is 35.

The square root of 667565 is about 817.0465103040. The cubic root of 667565 is about 87.3972671848.

The spelling of 667565 in words is "six hundred sixty-seven thousand, five hundred sixty-five".