65013784164661 has 2 divisors, whose sum is σ = 65013784164662. Its totient is φ = 65013784164660.

The previous prime is 65013784164607. The next prime is 65013784164673. The reversal of 65013784164661 is 16646148731056.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42395855664100 + 22617928500561 = 6511210^2 + 4755831^2 .

It is a cyclic number.

It is not a de Polignac number, because 65013784164661 - 2⁷ = 65013784164533 is a prime.

It is a super-2 number, since 2×65013784164661² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65013784164596 and 65013784164605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65013784864661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32506892082330 + 32506892082331.

It is an arithmetic number, because the mean of its divisors is an integer number (32506892082331).

Almost surely, 2^{65013784164661} is an apocalyptic number.

It is an amenable number.

65013784164661 is a deficient number, since it is larger than the sum of its proper divisors (1).

65013784164661 is an equidigital number, since it uses as much as digits as its factorization.

65013784164661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 65013784164661 in words is "sixty-five trillion, thirteen billion, seven hundred eighty-four million, one hundred sixty-four thousand, six hundred sixty-one".