66447312263 has 2 divisors, whose sum is σ = 66447312264. Its totient is φ = 66447312262.

The previous prime is 66447312209. The next prime is 66447312307. The reversal of 66447312263 is 36221374466.

66447312263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (66447312307) can be obtained adding 66447312263 to its sum of digits (44).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66447312263 - 2²⁸ = 66178876807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66447312203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33223656131 + 33223656132.

It is an arithmetic number, because the mean of its divisors is an integer number (33223656132).

Almost surely, 2^66447312263 is an apocalyptic number.

66447312263 is a deficient number, since it is larger than the sum of its proper divisors (1).

66447312263 is an equidigital number, since it uses as much as digits as its factorization.

66447312263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 44.

The spelling of 66447312263 in words is "sixty-six billion, four hundred forty-seven million, three hundred twelve thousand, two hundred sixty-three".