66041688287 has 2 divisors, whose sum is σ = 66041688288. Its totient is φ = 66041688286.

The previous prime is 66041688157. The next prime is 66041688329. The reversal of 66041688287 is 78288614066.

66041688287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66041688287 - 2²² = 66037493983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66041684287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33020844143 + 33020844144.

It is an arithmetic number, because the mean of its divisors is an integer number (33020844144).

Almost surely, 2^66041688287 is an apocalyptic number.

66041688287 is a deficient number, since it is larger than the sum of its proper divisors (1).

66041688287 is an equidigital number, since it uses as much as digits as its factorization.

66041688287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 66041688287 in words is "sixty-six billion, forty-one million, six hundred eighty-eight thousand, two hundred eighty-seven".