66300643 has 2 divisors, whose sum is σ = 66300644. Its totient is φ = 66300642.

The previous prime is 66300623. The next prime is 66300653. The reversal of 66300643 is 34600366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66300643 - 2⁹ = 66300131 is a prime.

It is not a weakly prime, because it can be changed into another prime (66300613) 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, 33150321 + 33150322.

It is an arithmetic number, because the mean of its divisors is an integer number (33150322).

Almost surely, 2^66300643 is an apocalyptic number.

66300643 is a deficient number, since it is larger than the sum of its proper divisors (1).

66300643 is an equidigital number, since it uses as much as digits as its factorization.

66300643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 66300643 is about 8142.5206785123. The cubic root of 66300643 is about 404.7366941673.

The spelling of 66300643 in words is "sixty-six million, three hundred thousand, six hundred forty-three".