64663559 has 2 divisors, whose sum is σ = 64663560. Its totient is φ = 64663558.

The previous prime is 64663553. The next prime is 64663561. The reversal of 64663559 is 95536646.

64663559 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 is a cyclic number.

It is not a de Polignac number, because 64663559 - 2²⁴ = 47886343 is a prime.

It is a Sophie Germain prime.

Together with 64663561, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64663553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32331779 + 32331780.

It is an arithmetic number, because the mean of its divisors is an integer number (32331780).

Almost surely, 2^64663559 is an apocalyptic number.

64663559 is a deficient number, since it is larger than the sum of its proper divisors (1).

64663559 is an equidigital number, since it uses as much as digits as its factorization.

64663559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 44.

The square root of 64663559 is about 8041.3654934967. The cubic root of 64663559 is about 401.3776642390.

The spelling of 64663559 in words is "sixty-four million, six hundred sixty-three thousand, five hundred fifty-nine".