65070721117 has 2 divisors, whose sum is σ = 65070721118. Its totient is φ = 65070721116.

The previous prime is 65070721099. The next prime is 65070721139. The reversal of 65070721117 is 71112707056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60802189561 + 4268531556 = 246581^2 + 65334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65070721117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65070722117) 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, 32535360558 + 32535360559.

It is an arithmetic number, because the mean of its divisors is an integer number (32535360559).

Almost surely, 2^65070721117 is an apocalyptic number.

It is an amenable number.

65070721117 is a deficient number, since it is larger than the sum of its proper divisors (1).

65070721117 is an equidigital number, since it uses as much as digits as its factorization.

65070721117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20580, while the sum is 37.

The spelling of 65070721117 in words is "sixty-five billion, seventy million, seven hundred twenty-one thousand, one hundred seventeen".