66066587 has 2 divisors, whose sum is σ = 66066588. Its totient is φ = 66066586.

The previous prime is 66066563. The next prime is 66066617. The reversal of 66066587 is 78566066.

66066587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66066587 - 2⁶ = 66066523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66066527) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33033293 + 33033294.

It is an arithmetic number, because the mean of its divisors is an integer number (33033294).

Almost surely, 2^66066587 is an apocalyptic number.

66066587 is a deficient number, since it is larger than the sum of its proper divisors (1).

66066587 is an equidigital number, since it uses as much as digits as its factorization.

66066587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 66066587 is about 8128.1355180632. The cubic root of 66066587 is about 404.2598624684.

The spelling of 66066587 in words is "sixty-six million, sixty-six thousand, five hundred eighty-seven".