8667681 has 8 divisors (see below), whose sum is σ = 12607584. Its totient is φ = 5253120.

The previous prime is 8667677. The next prime is 8667689. The reversal of 8667681 is 1867668.

8667681 is nontrivially palindromic in base 2.

8667681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8667681 - 2² = 8667677 is a prime.

It is a super-2 number, since 2×8667681² = 150257387835522, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (8667689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131296 + ... + 131361.

It is an arithmetic number, because the mean of its divisors is an integer number (1575948).

Almost surely, 2^8667681 is an apocalyptic number.

It is an amenable number.

8667681 is a deficient number, since it is larger than the sum of its proper divisors (3939903).

8667681 is a wasteful number, since it uses less digits than its factorization.

8667681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262671.

The product of its digits is 96768, while the sum is 42.

The square root of 8667681 is about 2944.0925596863. The cubic root of 8667681 is about 205.4160181580.

The spelling of 8667681 in words is "eight million, six hundred sixty-seven thousand, six hundred eighty-one".