8165564 has 18 divisors (see below), whose sum is σ = 15707832. Its totient is φ = 3711400.

The previous prime is 8165543. The next prime is 8165569. The reversal of 8165564 is 4655618.

8165564 = 27² + 28² + ... + 290².

It is a happy number.

It is a super-3 number, since 3×8165564³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8165569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7952 + ... + 8919.

Almost surely, 2^8165564 is an apocalyptic number.

It is an amenable number.

8165564 is a deficient number, since it is larger than the sum of its proper divisors (7542268).

8165564 is a wasteful number, since it uses less digits than its factorization.

8165564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16897 (or 16884 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 8165564 is about 2857.5451002565. The cubic root of 8165564 is about 201.3702900839.

The spelling of 8165564 in words is "eight million, one hundred sixty-five thousand, five hundred sixty-four".