65941256651 has 2 divisors, whose sum is σ = 65941256652. Its totient is φ = 65941256650.

The previous prime is 65941256561. The next prime is 65941256677. The reversal of 65941256651 is 15665214956.

Together with previous prime (65941256561) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65941256651 - 2³⁰ = 64867514827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65941256651.

It is not a weakly prime, because it can be changed into another prime (65941256851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32970628325 + 32970628326.

It is an arithmetic number, because the mean of its divisors is an integer number (32970628326).

Almost surely, 2^65941256651 is an apocalyptic number.

65941256651 is a deficient number, since it is larger than the sum of its proper divisors (1).

65941256651 is an equidigital number, since it uses as much as digits as its factorization.

65941256651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944000, while the sum is 50.

The spelling of 65941256651 in words is "sixty-five billion, nine hundred forty-one million, two hundred fifty-six thousand, six hundred fifty-one".