65775959 has 2 divisors, whose sum is σ = 65775960. Its totient is φ = 65775958.

The previous prime is 65775949. The next prime is 65775971. The reversal of 65775959 is 95957756.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65775959 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65775959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65775949) 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, 32887979 + 32887980.

It is an arithmetic number, because the mean of its divisors is an integer number (32887980).

Almost surely, 2^65775959 is an apocalyptic number.

65775959 is a deficient number, since it is larger than the sum of its proper divisors (1).

65775959 is an equidigital number, since it uses as much as digits as its factorization.

65775959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2976750, while the sum is 53.

The square root of 65775959 is about 8110.2379126632. The cubic root of 65775959 is about 403.6662091965. Note that the first 3 decimals are identical.

The spelling of 65775959 in words is "sixty-five million, seven hundred seventy-five thousand, nine hundred fifty-nine".