66711763 has 2 divisors, whose sum is σ = 66711764. Its totient is φ = 66711762.

The previous prime is 66711751. The next prime is 66711769. The reversal of 66711763 is 36711766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66711763 - 2²⁵ = 33157331 is a prime.

It is not a weakly prime, because it can be changed into another prime (66711769) 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, 33355881 + 33355882.

It is an arithmetic number, because the mean of its divisors is an integer number (33355882).

Almost surely, 2^66711763 is an apocalyptic number.

66711763 is a deficient number, since it is larger than the sum of its proper divisors (1).

66711763 is an equidigital number, since it uses as much as digits as its factorization.

66711763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 66711763 is about 8167.7269175702. The cubic root of 66711763 is about 405.5715407668.

The spelling of 66711763 in words is "sixty-six million, seven hundred eleven thousand, seven hundred sixty-three".