664935 has 16 divisors (see below), whose sum is σ = 1077216. Its totient is φ = 350208.

The previous prime is 664933. The next prime is 664949. The reversal of 664935 is 539466.

It is a happy number.

664935 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664935 - 2¹ = 664933 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 664896 and 664905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664933) 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, 1227 + ... + 1683.

It is an arithmetic number, because the mean of its divisors is an integer number (67326).

2⁶⁶⁴⁹³⁵ is an apocalyptic number.

664935 is a deficient number, since it is larger than the sum of its proper divisors (412281).

664935 is a wasteful number, since it uses less digits than its factorization.

664935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562.

The product of its digits is 19440, while the sum is 33.

The square root of 664935 is about 815.4354664840. The cubic root of 664935 is about 87.2823433809.

The spelling of 664935 in words is "six hundred sixty-four thousand, nine hundred thirty-five".