66000287 has 2 divisors, whose sum is σ = 66000288. Its totient is φ = 66000286.

The previous prime is 66000269. The next prime is 66000299. The reversal of 66000287 is 78200066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66000287 - 2⁶ = 66000223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66000217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33000143 + 33000144.

It is an arithmetic number, because the mean of its divisors is an integer number (33000144).

Almost surely, 2^66000287 is an apocalyptic number.

66000287 is a deficient number, since it is larger than the sum of its proper divisors (1).

66000287 is an equidigital number, since it uses as much as digits as its factorization.

66000287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 66000287 is about 8124.0560682457. The cubic root of 66000287 is about 404.1245878371.

The spelling of 66000287 in words is "sixty-six million, two hundred eighty-seven", and thus it is an aban number.