8516662212187 has 2 divisors, whose sum is σ = 8516662212188. Its totient is φ = 8516662212186.

The previous prime is 8516662212181. The next prime is 8516662212197. The reversal of 8516662212187 is 7812122666158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8516662212187 - 2³¹ = 8514514728539 is a prime.

It is a super-2 number, since 2×8516662212187² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8516662212181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4258331106093 + 4258331106094.

It is an arithmetic number, because the mean of its divisors is an integer number (4258331106094).

Almost surely, 2^{8516662212187} is an apocalyptic number.

8516662212187 is a deficient number, since it is larger than the sum of its proper divisors (1).

8516662212187 is an equidigital number, since it uses as much as digits as its factorization.

8516662212187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 55.

The spelling of 8516662212187 in words is "eight trillion, five hundred sixteen billion, six hundred sixty-two million, two hundred twelve thousand, one hundred eighty-seven".