8666915616 has 72 divisors (see below), whose sum is σ = 24668047404. Its totient is φ = 2886451200.

The previous prime is 8666915567. The next prime is 8666915641. The reversal of 8666915616 is 6165196668.

It can be written as a sum of positive squares in 2 ways, for example, as 6551283600 + 2115632016 = 80940^2 + 45996^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 333360 + ... + 358416.

Almost surely, 2^8666915616 is an apocalyptic number.

It is an amenable number.

8666915616 is an abundant number, since it is smaller than the sum of its proper divisors (16001131788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8666915616 is a wasteful number, since it uses less digits than its factorization.

8666915616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26274 (or 26263 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 8666915616 is about 93096.2706879282. The cubic root of 8666915616 is about 2054.0997168252.

The spelling of 8666915616 in words is "eight billion, six hundred sixty-six million, nine hundred fifteen thousand, six hundred sixteen".