664033 has 4 divisors (see below), whose sum is σ = 692928. Its totient is φ = 635140.

The previous prime is 664019. The next prime is 664043. The reversal of 664033 is 330466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 330466 = 2 ⋅165233.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663995 and 664013.

It is not an unprimeable number, because it can be changed into a prime (664043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14413 + ... + 14458.

It is an arithmetic number, because the mean of its divisors is an integer number (173232).

2⁶⁶⁴⁰³³ is an apocalyptic number.

It is an amenable number.

664033 is a deficient number, since it is larger than the sum of its proper divisors (28895).

664033 is a wasteful number, since it uses less digits than its factorization.

664033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28894.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 664033 is about 814.8822000756. The cubic root of 664033 is about 87.2428586695.

Adding to 664033 its reverse (330466), we get a palindrome (994499).

The spelling of 664033 in words is "six hundred sixty-four thousand, thirty-three".