665038 has 32 divisors (see below), whose sum is σ = 1203840. Its totient is φ = 272160.

The previous prime is 665029. The next prime is 665039. The reversal of 665038 is 830566.

665038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 664997 and 665015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15445 + ... + 15487.

It is an arithmetic number, because the mean of its divisors is an integer number (37620).

2⁶⁶⁵⁰³⁸ is an apocalyptic number.

665038 is a deficient number, since it is larger than the sum of its proper divisors (538802).

665038 is a wasteful number, since it uses less digits than its factorization.

665038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 665038 is about 815.4986204771. The cubic root of 665038 is about 87.2868498952.

The spelling of 665038 in words is "six hundred sixty-five thousand, thirty-eight".