8661248567 has 2 divisors, whose sum is σ = 8661248568. Its totient is φ = 8661248566.

The previous prime is 8661248543. The next prime is 8661248569. The reversal of 8661248567 is 7658421668.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8661248567 - 2⁸ = 8661248311 is a prime.

Together with 8661248569, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8661248569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4330624283 + 4330624284.

It is an arithmetic number, because the mean of its divisors is an integer number (4330624284).

Almost surely, 2^8661248567 is an apocalyptic number.

8661248567 is a deficient number, since it is larger than the sum of its proper divisors (1).

8661248567 is an equidigital number, since it uses as much as digits as its factorization.

8661248567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 53.

The square root of 8661248567 is about 93065.8292124451. The cubic root of 8661248567 is about 2053.6519134637.

The spelling of 8661248567 in words is "eight billion, six hundred sixty-one million, two hundred forty-eight thousand, five hundred sixty-seven".