8661366523 has 2 divisors, whose sum is σ = 8661366524. Its totient is φ = 8661366522.

The previous prime is 8661366487. The next prime is 8661366629. The reversal of 8661366523 is 3256631668.

8661366523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8661366523 - 2²¹ = 8659269371 is a prime.

It is not a weakly prime, because it can be changed into another prime (8661360523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4330683261 + 4330683262.

It is an arithmetic number, because the mean of its divisors is an integer number (4330683262).

Almost surely, 2^8661366523 is an apocalyptic number.

8661366523 is a deficient number, since it is larger than the sum of its proper divisors (1).

8661366523 is an equidigital number, since it uses as much as digits as its factorization.

8661366523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 46.

The square root of 8661366523 is about 93066.4629337550. The cubic root of 8661366523 is about 2053.6612361945.

The spelling of 8661366523 in words is "eight billion, six hundred sixty-one million, three hundred sixty-six thousand, five hundred twenty-three".