8961636866 has 32 divisors (see below), whose sum is σ = 16579261440. Its totient is φ = 3537827136.

The previous prime is 8961636863. The next prime is 8961636883. The reversal of 8961636866 is 6686361698.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8961636863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35780 + ... + 138576.

It is an arithmetic number, because the mean of its divisors is an integer number (518101920).

Almost surely, 2^8961636866 is an apocalyptic number.

8961636866 is a deficient number, since it is larger than the sum of its proper divisors (7617624574).

8961636866 is a wasteful number, since it uses less digits than its factorization.

8961636866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103298.

The product of its digits is 13436928, while the sum is 59.

The square root of 8961636866 is about 94665.9224113936. The cubic root of 8961636866 is about 2077.1241124596.

The spelling of 8961636866 in words is "eight billion, nine hundred sixty-one million, six hundred thirty-six thousand, eight hundred sixty-six".