664003023 has 4 divisors (see below), whose sum is σ = 885337368. Its totient is φ = 442668680.

The previous prime is 664003007. The next prime is 664003049. The reversal of 664003023 is 320300466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664003023 - 2⁴ = 664003007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664002984 and 664003002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664003063) 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, 110667168 + ... + 110667173.

It is an arithmetic number, because the mean of its divisors is an integer number (221334342).

Almost surely, 2^664003023 is an apocalyptic number.

664003023 is a deficient number, since it is larger than the sum of its proper divisors (221334345).

664003023 is a wasteful number, since it uses less digits than its factorization.

664003023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221334344.

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

The square root of 664003023 is about 25768.2561109595. The cubic root of 664003023 is about 872.4154582387.

Adding to 664003023 its reverse (320300466), we get a palindrome (984303489).

The spelling of 664003023 in words is "six hundred sixty-four million, three thousand, twenty-three".