8686657334261 has 2 divisors, whose sum is σ = 8686657334262. Its totient is φ = 8686657334260.

The previous prime is 8686657334197. The next prime is 8686657334273. The reversal of 8686657334261 is 1624337566868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8430109006225 + 256548328036 = 2903465^2 + 506506^2 .

It is a cyclic number.

It is not a de Polignac number, because 8686657334261 - 2⁶ = 8686657334197 is a prime.

It is a super-2 number, since 2×8686657334261² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8686677334261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4343328667130 + 4343328667131.

It is an arithmetic number, because the mean of its divisors is an integer number (4343328667131).

Almost surely, 2^{8686657334261} is an apocalyptic number.

It is an amenable number.

8686657334261 is a deficient number, since it is larger than the sum of its proper divisors (1).

8686657334261 is an equidigital number, since it uses as much as digits as its factorization.

8686657334261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209018880, while the sum is 65.

The spelling of 8686657334261 in words is "eight trillion, six hundred eighty-six billion, six hundred fifty-seven million, three hundred thirty-four thousand, two hundred sixty-one".