665043 has 8 divisors (see below), whose sum is σ = 915456. Its totient is φ = 429000.

The previous prime is 665039. The next prime is 665047. The reversal of 665043 is 340566.

665043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (665039) and next prime (665047).

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

It is not a de Polignac number, because 665043 - 2² = 665039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665047) 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, 3483 + ... + 3668.

It is an arithmetic number, because the mean of its divisors is an integer number (114432).

2⁶⁶⁵⁰⁴³ is an apocalyptic number.

665043 is a deficient number, since it is larger than the sum of its proper divisors (250413).

665043 is a wasteful number, since it uses less digits than its factorization.

665043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7185.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 665043 is about 815.5016860804. The cubic root of 665043 is about 87.2870686462.

The spelling of 665043 in words is "six hundred sixty-five thousand, forty-three".