8567997660 has 144 divisors (see below), whose sum is σ = 26431423200. Its totient is φ = 2246284800.

The previous prime is 8567997563. The next prime is 8567997661. The reversal of 8567997660 is 667997658.

8567997660 is a `hidden beast` number, since 8 + 567 + 9 + 9 + 7 + 6 + 60 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8567997661) 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 47 ways as a sum of consecutive naturals, for example, 2707239 + ... + 2710401.

It is an arithmetic number, because the mean of its divisors is an integer number (183551550).

Almost surely, 2^8567997660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8567997660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13215711600).

8567997660 is an abundant number, since it is smaller than the sum of its proper divisors (17863425540).

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

8567997660 is a wasteful number, since it uses less digits than its factorization.

8567997660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428 (or 3423 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 63.

The square root of 8567997660 is about 92563.4790832756. The cubic root of 8567997660 is about 2046.2551230842.

The spelling of 8567997660 in words is "eight billion, five hundred sixty-seven million, nine hundred ninety-seven thousand, six hundred sixty".