664752149 has 2 divisors, whose sum is σ = 664752150. Its totient is φ = 664752148.

The previous prime is 664752131. The next prime is 664752157. The reversal of 664752149 is 941257466.

664752149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511438225 + 153313924 = 22615^2 + 12382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664752149 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664752119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332376074 + 332376075.

It is an arithmetic number, because the mean of its divisors is an integer number (332376075).

Almost surely, 2^664752149 is an apocalyptic number.

It is an amenable number.

664752149 is a deficient number, since it is larger than the sum of its proper divisors (1).

664752149 is an equidigital number, since it uses as much as digits as its factorization.

664752149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 664752149 is about 25782.7878438310. The cubic root of 664752149 is about 872.7434203396.

The spelling of 664752149 in words is "six hundred sixty-four million, seven hundred fifty-two thousand, one hundred forty-nine".