86665787528653 has 2 divisors, whose sum is σ = 86665787528654. Its totient is φ = 86665787528652.

The previous prime is 86665787528629. The next prime is 86665787528659. The reversal of 86665787528653 is 35682578756668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71580432512484 + 15085355016169 = 8460522^2 + 3883987^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86665787528653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86665787528659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43332893764326 + 43332893764327.

It is an arithmetic number, because the mean of its divisors is an integer number (43332893764327).

Almost surely, 2^{86665787528653} is an apocalyptic number.

It is an amenable number.

86665787528653 is a deficient number, since it is larger than the sum of its proper divisors (1).

86665787528653 is an equidigital number, since it uses as much as digits as its factorization.

86665787528653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536000, while the sum is 82.

The spelling of 86665787528653 in words is "eighty-six trillion, six hundred sixty-five billion, seven hundred eighty-seven million, five hundred twenty-eight thousand, six hundred fifty-three".