664061347 has 2 divisors, whose sum is σ = 664061348. Its totient is φ = 664061346.

The previous prime is 664061339. The next prime is 664061369. The reversal of 664061347 is 743160466.

664061347 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 664061347 - 2³ = 664061339 is a prime.

It is not a weakly prime, because it can be changed into another prime (664061317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332030673 + 332030674.

It is an arithmetic number, because the mean of its divisors is an integer number (332030674).

Almost surely, 2^664061347 is an apocalyptic number.

664061347 is a deficient number, since it is larger than the sum of its proper divisors (1).

664061347 is an equidigital number, since it uses as much as digits as its factorization.

664061347 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 37.

The square root of 664061347 is about 25769.3877886146. The cubic root of 664061347 is about 872.4410009284.

The spelling of 664061347 in words is "six hundred sixty-four million, sixty-one thousand, three hundred forty-seven".