65803920947 has 2 divisors, whose sum is σ = 65803920948. Its totient is φ = 65803920946.

The previous prime is 65803920901. The next prime is 65803920953. The reversal of 65803920947 is 74902930856.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65803920947 is a prime.

It is not a weakly prime, because it can be changed into another prime (65803920547) 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, 32901960473 + 32901960474.

It is an arithmetic number, because the mean of its divisors is an integer number (32901960474).

Almost surely, 2^65803920947 is an apocalyptic number.

65803920947 is a deficient number, since it is larger than the sum of its proper divisors (1).

65803920947 is an equidigital number, since it uses as much as digits as its factorization.

65803920947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 53.

Subtracting 65803920947 from its reverse (74902930856), we obtain a palindrome (9099009909).

The spelling of 65803920947 in words is "sixty-five billion, eight hundred three million, nine hundred twenty thousand, nine hundred forty-seven".