66563087 has 2 divisors, whose sum is σ = 66563088. Its totient is φ = 66563086.

The previous prime is 66563083. The next prime is 66563089. The reversal of 66563087 is 78036566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66563087 - 2² = 66563083 is a prime.

Together with 66563089, 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 (66563083) 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, 33281543 + 33281544.

It is an arithmetic number, because the mean of its divisors is an integer number (33281544).

Almost surely, 2^66563087 is an apocalyptic number.

66563087 is a deficient number, since it is larger than the sum of its proper divisors (1).

66563087 is an equidigital number, since it uses as much as digits as its factorization.

66563087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 66563087 is about 8158.6204103390. The cubic root of 66563087 is about 405.2700267018.

The spelling of 66563087 in words is "sixty-six million, five hundred sixty-three thousand, eighty-seven".