8464881665 has 4 divisors (see below), whose sum is σ = 10157858004. Its totient is φ = 6771905328.

The previous prime is 8464881661. The next prime is 8464881671. The reversal of 8464881665 is 5661884648.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5285726209 + 3179155456 = 72703^2 + 56384^2 .

It is a cyclic number.

It is not a de Polignac number, because 8464881665 - 2² = 8464881661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8464881665.

It is not an unprimeable number, because it can be changed into a prime (8464881661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846488162 + ... + 846488171.

It is an arithmetic number, because the mean of its divisors is an integer number (2539464501).

Almost surely, 2^8464881665 is an apocalyptic number.

It is an amenable number.

8464881665 is a deficient number, since it is larger than the sum of its proper divisors (1692976339).

8464881665 is a wasteful number, since it uses less digits than its factorization.

8464881665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692976338.

The product of its digits is 8847360, while the sum is 56.

The square root of 8464881665 is about 92004.7915328327. The cubic root of 8464881665 is about 2038.0130648169.

The spelling of 8464881665 in words is "eight billion, four hundred sixty-four million, eight hundred eighty-one thousand, six hundred sixty-five".