8506665441 has 20 divisors (see below), whose sum is σ = 12723028032. Its totient is φ = 5664175128.

The previous prime is 8506665403. The next prime is 8506665443. The reversal of 8506665441 is 1445666058.

It is not a de Polignac number, because 8506665441 - 2¹¹ = 8506663393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8506665443) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2860 + ... + 130466.

Almost surely, 2^8506665441 is an apocalyptic number.

8506665441 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8506665441 is a deficient number, since it is larger than the sum of its proper divisors (4216362591).

8506665441 is a wasteful number, since it uses less digits than its factorization.

8506665441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128442 (or 128433 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 8506665441 is about 92231.5859182742. The cubic root of 8506665441 is about 2041.3608631740.

The spelling of 8506665441 in words is "eight billion, five hundred six million, six hundred sixty-five thousand, four hundred forty-one".