66413287 has 2 divisors, whose sum is σ = 66413288. Its totient is φ = 66413286.

The previous prime is 66413159. The next prime is 66413297. The reversal of 66413287 is 78231466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66413287 - 2⁷ = 66413159 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 (66413297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33206643 + 33206644.

It is an arithmetic number, because the mean of its divisors is an integer number (33206644).

Almost surely, 2^66413287 is an apocalyptic number.

66413287 is a deficient number, since it is larger than the sum of its proper divisors (1).

66413287 is an equidigital number, since it uses as much as digits as its factorization.

66413287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 66413287 is about 8149.4347656755. The cubic root of 66413287 is about 404.9657787475.

The spelling of 66413287 in words is "sixty-six million, four hundred thirteen thousand, two hundred eighty-seven".