8661266623 has 2 divisors, whose sum is σ = 8661266624. Its totient is φ = 8661266622.

The previous prime is 8661266599. The next prime is 8661266629. The reversal of 8661266623 is 3266621668.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8661266623 - 2³³ = 71332031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8661266629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4330633311 + 4330633312.

It is an arithmetic number, because the mean of its divisors is an integer number (4330633312).

Almost surely, 2^8661266623 is an apocalyptic number.

8661266623 is a deficient number, since it is larger than the sum of its proper divisors (1).

8661266623 is an equidigital number, since it uses as much as digits as its factorization.

8661266623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 46.

The square root of 8661266623 is about 93065.9262189981. The cubic root of 8661266623 is about 2053.6533405372.

The spelling of 8661266623 in words is "eight billion, six hundred sixty-one million, two hundred sixty-six thousand, six hundred twenty-three".