664535 has 8 divisors (see below), whose sum is σ = 825120. Its totient is φ = 513184.

The previous prime is 664529. The next prime is 664537. The reversal of 664535 is 535466.

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

It is not a de Polignac number, because 664535 - 2⁶ = 664471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 664498 and 664507.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664535.

It is not an unprimeable number, because it can be changed into a prime (664537) 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 7 ways as a sum of consecutive naturals, for example, 2147 + ... + 2436.

It is an arithmetic number, because the mean of its divisors is an integer number (103140).

2⁶⁶⁴⁵³⁵ is an apocalyptic number.

664535 is a deficient number, since it is larger than the sum of its proper divisors (160585).

664535 is a wasteful number, since it uses less digits than its factorization.

664535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617.

The product of its digits is 10800, while the sum is 29.

The square root of 664535 is about 815.1901618641. The cubic root of 664535 is about 87.2648379403.

The spelling of 664535 in words is "six hundred sixty-four thousand, five hundred thirty-five".