66388363 has 2 divisors, whose sum is σ = 66388364. Its totient is φ = 66388362.

The previous prime is 66388351. The next prime is 66388381. The reversal of 66388363 is 36388366.

It is a happy number.

66388363 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66388363 - 2⁹ = 66387851 is a prime.

It is not a weakly prime, because it can be changed into another prime (66386363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33194181 + 33194182.

It is an arithmetic number, because the mean of its divisors is an integer number (33194182).

Almost surely, 2^66388363 is an apocalyptic number.

66388363 is a deficient number, since it is larger than the sum of its proper divisors (1).

66388363 is an equidigital number, since it uses as much as digits as its factorization.

66388363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 43.

The square root of 66388363 is about 8147.9054363683. The cubic root of 66388363 is about 404.9151130327.

The spelling of 66388363 in words is "sixty-six million, three hundred eighty-eight thousand, three hundred sixty-three".