66448579 has 2 divisors, whose sum is σ = 66448580. Its totient is φ = 66448578.

The previous prime is 66448561. The next prime is 66448601. The reversal of 66448579 is 97584466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66448579 - 2⁷ = 66448451 is a prime.

It is a super-2 number, since 2×66448579² = 8830827302238482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66445579) by changing a digit.

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, 33224289 + 33224290.

It is an arithmetic number, because the mean of its divisors is an integer number (33224290).

Almost surely, 2^66448579 is an apocalyptic number.

66448579 is a deficient number, since it is larger than the sum of its proper divisors (1).

66448579 is an equidigital number, since it uses as much as digits as its factorization.

66448579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 49.

The square root of 66448579 is about 8151.5997816380. The cubic root of 66448579 is about 405.0374989411.

The spelling of 66448579 in words is "sixty-six million, four hundred forty-eight thousand, five hundred seventy-nine".