66510959 has 2 divisors, whose sum is σ = 66510960. Its totient is φ = 66510958.

The previous prime is 66510937. The next prime is 66510991. The reversal of 66510959 is 95901566.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66510959 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 (66510359) 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, 33255479 + 33255480.

It is an arithmetic number, because the mean of its divisors is an integer number (33255480).

Almost surely, 2^66510959 is an apocalyptic number.

66510959 is a deficient number, since it is larger than the sum of its proper divisors (1).

66510959 is an equidigital number, since it uses as much as digits as its factorization.

66510959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 66510959 is about 8155.4251268711. The cubic root of 66510959 is about 405.1642051214.

The spelling of 66510959 in words is "sixty-six million, five hundred ten thousand, nine hundred fifty-nine".