665063 has 4 divisors (see below), whose sum is σ = 760080. Its totient is φ = 570048.

The previous prime is 665053. The next prime is 665069. The reversal of 665063 is 360566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 665063 - 2⁴ = 665047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665069) 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, 47498 + ... + 47511.

It is an arithmetic number, because the mean of its divisors is an integer number (190020).

2⁶⁶⁵⁰⁶³ is an apocalyptic number.

665063 is a deficient number, since it is larger than the sum of its proper divisors (95017).

665063 is an equidigital number, since it uses as much as digits as its factorization.

665063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95016.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 665063 is about 815.5139483786. The cubic root of 665063 is about 87.2879436392.

The spelling of 665063 in words is "six hundred sixty-five thousand, sixty-three".