8667641 has 2 divisors, whose sum is σ = 8667642. Its totient is φ = 8667640.

The previous prime is 8667613. The next prime is 8667653. The reversal of 8667641 is 1467668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6651241 + 2016400 = 2579^2 + 1420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8667641 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8667595 and 8667604.

It is not a weakly prime, because it can be changed into another prime (8667601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4333820 + 4333821.

It is an arithmetic number, because the mean of its divisors is an integer number (4333821).

Almost surely, 2^8667641 is an apocalyptic number.

It is an amenable number.

8667641 is a deficient number, since it is larger than the sum of its proper divisors (1).

8667641 is an equidigital number, since it uses as much as digits as its factorization.

8667641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 8667641 is about 2944.0857664137. The cubic root of 8667641 is about 205.4157021698.

The spelling of 8667641 in words is "eight million, six hundred sixty-seven thousand, six hundred forty-one".