65941678651 has 2 divisors, whose sum is σ = 65941678652. Its totient is φ = 65941678650.

The previous prime is 65941678639. The next prime is 65941678679. The reversal of 65941678651 is 15687614956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65941678651 - 2²³ = 65933290043 is a prime.

It is not a weakly prime, because it can be changed into another prime (65941672651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32970839325 + 32970839326.

It is an arithmetic number, because the mean of its divisors is an integer number (32970839326).

Almost surely, 2^65941678651 is an apocalyptic number.

65941678651 is a deficient number, since it is larger than the sum of its proper divisors (1).

65941678651 is an equidigital number, since it uses as much as digits as its factorization.

65941678651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 58.

The spelling of 65941678651 in words is "sixty-five billion, nine hundred forty-one million, six hundred seventy-eight thousand, six hundred fifty-one".