8966705665 has 4 divisors (see below), whose sum is σ = 10760046804. Its totient is φ = 7173364528.

The previous prime is 8966705653. The next prime is 8966705681. The reversal of 8966705665 is 5665076698.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5665076698 = 2 ⋅2832538349.

It can be written as a sum of positive squares in 2 ways, for example, as 2297860096 + 6668845569 = 47936^2 + 81663^2 .

It is a cyclic number.

It is not a de Polignac number, because 8966705665 - 2²⁵ = 8933151233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896670562 + ... + 896670571.

It is an arithmetic number, because the mean of its divisors is an integer number (2690011701).

Almost surely, 2^8966705665 is an apocalyptic number.

It is an amenable number.

8966705665 is a deficient number, since it is larger than the sum of its proper divisors (1793341139).

8966705665 is a wasteful number, since it uses less digits than its factorization.

8966705665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793341138.

The product of its (nonzero) digits is 16329600, while the sum is 58.

The square root of 8966705665 is about 94692.6906630074. The cubic root of 8966705665 is about 2077.5156532904.

The spelling of 8966705665 in words is "eight billion, nine hundred sixty-six million, seven hundred five thousand, six hundred sixty-five".