8665933840 has 160 divisors (see below), whose sum is σ = 21117148416. Its totient is φ = 3304734720.

The previous prime is 8665933831. The next prime is 8665933847. The reversal of 8665933840 is 483395668.

It is not an unprimeable number, because it can be changed into a prime (8665933847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38175807 + ... + 38176033.

Almost surely, 2^8665933840 is an apocalyptic number.

8665933840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8665933840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10558574208).

8665933840 is an abundant number, since it is smaller than the sum of its proper divisors (12451214576).

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

8665933840 is a wasteful number, since it uses less digits than its factorization.

8665933840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 52.

The square root of 8665933840 is about 93090.9976313499. The cubic root of 8665933840 is about 2054.0221520549.

The spelling of 8665933840 in words is "eight billion, six hundred sixty-five million, nine hundred thirty-three thousand, eight hundred forty".