66846887 has 2 divisors, whose sum is σ = 66846888. Its totient is φ = 66846886.

The previous prime is 66846869. The next prime is 66846889. The reversal of 66846887 is 78864866.

It is a happy number.

66846887 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 66846887 - 2¹⁴ = 66830503 is a prime.

Together with 66846889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66846889) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33423443 + 33423444.

It is an arithmetic number, because the mean of its divisors is an integer number (33423444).

Almost surely, 2^66846887 is an apocalyptic number.

66846887 is a deficient number, since it is larger than the sum of its proper divisors (1).

66846887 is an equidigital number, since it uses as much as digits as its factorization.

66846887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3096576, while the sum is 53.

The square root of 66846887 is about 8175.9945572389. The cubic root of 66846887 is about 405.8451831120.

The spelling of 66846887 in words is "sixty-six million, eight hundred forty-six thousand, eight hundred eighty-seven".