66383641 has 2 divisors, whose sum is σ = 66383642. Its totient is φ = 66383640.

The previous prime is 66383627. The next prime is 66383671. The reversal of 66383641 is 14638366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38081241 + 28302400 = 6171^2 + 5320^2 .

It is a cyclic number.

It is not a de Polignac number, because 66383641 - 2¹¹ = 66381593 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66383641.

It is not a weakly prime, because it can be changed into another prime (66383671) 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, 33191820 + 33191821.

It is an arithmetic number, because the mean of its divisors is an integer number (33191821).

Almost surely, 2^66383641 is an apocalyptic number.

It is an amenable number.

66383641 is a deficient number, since it is larger than the sum of its proper divisors (1).

66383641 is an equidigital number, since it uses as much as digits as its factorization.

66383641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 37.

The square root of 66383641 is about 8147.6156634932. The cubic root of 66383641 is about 404.9055126830.

The spelling of 66383641 in words is "sixty-six million, three hundred eighty-three thousand, six hundred forty-one".