8025566440 has 64 divisors (see below), whose sum is σ = 19073640960. Its totient is φ = 3034402560.

The previous prime is 8025566429. The next prime is 8025566447. The reversal of 8025566440 is 446655208.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 8025566393 and 8025566402.

It is not an unprimeable number, because it can be changed into a prime (8025566447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21939 + ... + 128578.

It is an arithmetic number, because the mean of its divisors is an integer number (298025640).

Almost surely, 2^8025566440 is an apocalyptic number.

It is an amenable number.

8025566440 is an abundant number, since it is smaller than the sum of its proper divisors (11048074520).

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

8025566440 is a wasteful number, since it uses less digits than its factorization.

8025566440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150602 (or 150598 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The square root of 8025566440 is about 89585.5258398364. The cubic root of 8025566440 is about 2002.1282710944.

The spelling of 8025566440 in words is "eight billion, twenty-five million, five hundred sixty-six thousand, four hundred forty".