66385763 has 2 divisors, whose sum is σ = 66385764. Its totient is φ = 66385762.

The previous prime is 66385721. The next prime is 66385789. The reversal of 66385763 is 36758366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66385763 - 2¹⁶ = 66320227 is a prime.

It is not a weakly prime, because it can be changed into another prime (66385793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33192881 + 33192882.

It is an arithmetic number, because the mean of its divisors is an integer number (33192882).

Almost surely, 2^66385763 is an apocalyptic number.

66385763 is a deficient number, since it is larger than the sum of its proper divisors (1).

66385763 is an equidigital number, since it uses as much as digits as its factorization.

66385763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 44.

The square root of 66385763 is about 8147.7458845990. The cubic root of 66385763 is about 404.9098270007.

The spelling of 66385763 in words is "sixty-six million, three hundred eighty-five thousand, seven hundred sixty-three".