664355723 has 2 divisors, whose sum is σ = 664355724. Its totient is φ = 664355722.

The previous prime is 664355717. The next prime is 664355743. The reversal of 664355723 is 327553466.

664355723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664355723 - 2⁸ = 664355467 is a prime.

It is not a weakly prime, because it can be changed into another prime (664355743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332177861 + 332177862.

It is an arithmetic number, because the mean of its divisors is an integer number (332177862).

Almost surely, 2^664355723 is an apocalyptic number.

664355723 is a deficient number, since it is larger than the sum of its proper divisors (1).

664355723 is an equidigital number, since it uses as much as digits as its factorization.

664355723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 41.

The square root of 664355723 is about 25775.0988940877. The cubic root of 664355723 is about 872.5698985333.

The spelling of 664355723 in words is "six hundred sixty-four million, three hundred fifty-five thousand, seven hundred twenty-three".