86466643517 has 2 divisors, whose sum is σ = 86466643518. Its totient is φ = 86466643516.

The previous prime is 86466643511. The next prime is 86466643541. The reversal of 86466643517 is 71534666468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44567009881 + 41899633636 = 211109^2 + 204694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86466643517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86466643511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43233321758 + 43233321759.

It is an arithmetic number, because the mean of its divisors is an integer number (43233321759).

Almost surely, 2^86466643517 is an apocalyptic number.

It is an amenable number.

86466643517 is a deficient number, since it is larger than the sum of its proper divisors (1).

86466643517 is an equidigital number, since it uses as much as digits as its factorization.

86466643517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17418240, while the sum is 56.

The spelling of 86466643517 in words is "eighty-six billion, four hundred sixty-six million, six hundred forty-three thousand, five hundred seventeen".