664233 has 4 divisors (see below), whose sum is σ = 885648. Its totient is φ = 442820.

The previous prime is 664211. The next prime is 664243. The reversal of 664233 is 332466.

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.

It is a cyclic number.

It is not a de Polignac number, because 664233 - 2⁸ = 663977 is a prime.

It is a D-number.

664233 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (664243) 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, 110703 + ... + 110708.

It is an arithmetic number, because the mean of its divisors is an integer number (221412).

2⁶⁶⁴²³³ is an apocalyptic number.

It is an amenable number.

664233 is a deficient number, since it is larger than the sum of its proper divisors (221415).

664233 is a wasteful number, since it uses less digits than its factorization.

664233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221414.

The product of its digits is 2592, while the sum is 24.

The square root of 664233 is about 815.0049079607. The cubic root of 664233 is about 87.2516166782.

Adding to 664233 its reverse (332466), we get a palindrome (996699).

It can be divided in two parts, 66 and 4233, that multiplied together give a triangular number (279378 = T₇₄₇).

The spelling of 664233 in words is "six hundred sixty-four thousand, two hundred thirty-three".