66479563 has 2 divisors, whose sum is σ = 66479564. Its totient is φ = 66479562.

The previous prime is 66479561. The next prime is 66479579. The reversal of 66479563 is 36597466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66479563 - 2¹ = 66479561 is a prime.

Together with 66479561, it forms a pair of twin primes.

It is the 8154-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (66479561) by changing a digit.

It is a nontrivial repunit in base 8153.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33239781 + 33239782.

It is an arithmetic number, because the mean of its divisors is an integer number (33239782).

Almost surely, 2^66479563 is an apocalyptic number.

66479563 is a deficient number, since it is larger than the sum of its proper divisors (1).

66479563 is an equidigital number, since it uses as much as digits as its factorization.

66479563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 46.

The square root of 66479563 is about 8153.5000459925. The cubic root of 66479563 is about 405.1004435116.

The spelling of 66479563 in words is "sixty-six million, four hundred seventy-nine thousand, five hundred sixty-three".