664012003 has 4 divisors (see below), whose sum is σ = 664267968. Its totient is φ = 663756040.

The previous prime is 664011983. The next prime is 664012031. The reversal of 664012003 is 300210466.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664012003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664012103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124051 + ... + 129292.

It is an arithmetic number, because the mean of its divisors is an integer number (166066992).

Almost surely, 2^664012003 is an apocalyptic number.

664012003 is a deficient number, since it is larger than the sum of its proper divisors (255965).

664012003 is a wasteful number, since it uses less digits than its factorization.

664012003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255964.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 664012003 is about 25768.4303557667. The cubic root of 664012003 is about 872.4193910800.

Adding to 664012003 its reverse (300210466), we get a palindrome (964222469).

The spelling of 664012003 in words is "six hundred sixty-four million, twelve thousand, three".