66563359 has 2 divisors, whose sum is σ = 66563360. Its totient is φ = 66563358.

The previous prime is 66563351. The next prime is 66563369. The reversal of 66563359 is 95336566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66563359 - 2³ = 66563351 is a prime.

It is a super-2 number, since 2×66563359² = 8861361522725762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66563351) 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, 33281679 + 33281680.

It is an arithmetic number, because the mean of its divisors is an integer number (33281680).

Almost surely, 2^66563359 is an apocalyptic number.

66563359 is a deficient number, since it is larger than the sum of its proper divisors (1).

66563359 is an equidigital number, since it uses as much as digits as its factorization.

66563359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 43.

The square root of 66563359 is about 8158.6370798069. The cubic root of 66563359 is about 405.2705787260.

The spelling of 66563359 in words is "sixty-six million, five hundred sixty-three thousand, three hundred fifty-nine".