664402733 has 2 divisors, whose sum is σ = 664402734. Its totient is φ = 664402732.

The previous prime is 664402727. The next prime is 664402751. The reversal of 664402733 is 337204466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 595213609 + 69189124 = 24397^2 + 8318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664402733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664402693 and 664402702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664402793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332201366 + 332201367.

It is an arithmetic number, because the mean of its divisors is an integer number (332201367).

Almost surely, 2^664402733 is an apocalyptic number.

It is an amenable number.

664402733 is a deficient number, since it is larger than the sum of its proper divisors (1).

664402733 is an equidigital number, since it uses as much as digits as its factorization.

664402733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 35.

The square root of 664402733 is about 25776.0108046222. The cubic root of 664402733 is about 872.5904791460.

The spelling of 664402733 in words is "six hundred sixty-four million, four hundred two thousand, seven hundred thirty-three".