8548666681 has 3 divisors (see below), whose sum is σ = 8548759141. Its totient is φ = 8548574222.

The previous prime is 8548666673. The next prime is 8548666717. The reversal of 8548666681 is 1866668458.

The square root of 8548666681 is 92459.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1866668458 = 2 ⋅933334229.

It is not a de Polignac number, because 8548666681 - 2³ = 8548666673 is a prime.

It is a super-2 number, since 2×8548666681² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8548667681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 46230 + ... + 138688.

Almost surely, 2^8548666681 is an apocalyptic number.

8548666681 is the 92459-th square number.

8548666681 is the 46230-th centered octagonal number.

It is an amenable number.

8548666681 is a deficient number, since it is larger than the sum of its proper divisors (92460).

8548666681 is an frugal number, since it uses more digits than its factorization.

8548666681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184918 (or 92459 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 58.

The cubic root of 8548666681 is about 2044.7150549395.

The spelling of 8548666681 in words is "eight billion, five hundred forty-eight million, six hundred sixty-six thousand, six hundred eighty-one".