664066003 has 2 divisors, whose sum is σ = 664066004. Its totient is φ = 664066002.

The previous prime is 664066001. The next prime is 664066037. The reversal of 664066003 is 300660466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664066003 - 2¹ = 664066001 is a prime.

Together with 664066001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (664066001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332033001 + 332033002.

It is an arithmetic number, because the mean of its divisors is an integer number (332033002).

Almost surely, 2^664066003 is an apocalyptic number.

664066003 is a deficient number, since it is larger than the sum of its proper divisors (1).

664066003 is an equidigital number, since it uses as much as digits as its factorization.

664066003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 664066003 is about 25769.4781282043. The cubic root of 664066003 is about 872.4430399347.

The spelling of 664066003 in words is "six hundred sixty-four million, sixty-six thousand, three".