8005040664 has 32 divisors (see below), whose sum is σ = 20123179440. Its totient is φ = 2653603200.

The previous prime is 8005040647. The next prime is 8005040669. The reversal of 8005040664 is 4660405008.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8005040669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 917047 + ... + 925734.

Almost surely, 2^8005040664 is an apocalyptic number.

It is an amenable number.

8005040664 is an abundant number, since it is smaller than the sum of its proper divisors (12118138776).

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

8005040664 is a wasteful number, since it uses less digits than its factorization.

8005040664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842971 (or 1842967 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 8005040664 is about 89470.8928311325. The cubic root of 8005040664 is about 2000.4199671410.

The spelling of 8005040664 in words is "eight billion, five million, forty thousand, six hundred sixty-four".