8666612281 has 2 divisors, whose sum is σ = 8666612282. Its totient is φ = 8666612280.

The previous prime is 8666612261. The next prime is 8666612299. The reversal of 8666612281 is 1822166668.

8666612281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7719203881 + 947408400 = 87859^2 + 30780^2 .

It is a cyclic number.

It is not a de Polignac number, because 8666612281 - 2²¹ = 8664515129 is a prime.

It is a super-2 number, since 2×8666612281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8666612261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4333306140 + 4333306141.

It is an arithmetic number, because the mean of its divisors is an integer number (4333306141).

Almost surely, 2^8666612281 is an apocalyptic number.

It is an amenable number.

8666612281 is a deficient number, since it is larger than the sum of its proper divisors (1).

8666612281 is an equidigital number, since it uses as much as digits as its factorization.

8666612281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 46.

The square root of 8666612281 is about 93094.6415267818. The cubic root of 8666612281 is about 2054.0757526056.

The spelling of 8666612281 in words is "eight billion, six hundred sixty-six million, six hundred twelve thousand, two hundred eighty-one".