6665565156 has 24 divisors (see below), whose sum is σ = 16467867360. Its totient is φ = 2091157632.

The previous prime is 6665565143. The next prime is 6665565167. The reversal of 6665565156 is 6515655666.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 6665565099 and 6665565108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16336966 + ... + 16337373.

It is an arithmetic number, because the mean of its divisors is an integer number (686161140).

Almost surely, 2^6665565156 is an apocalyptic number.

It is an amenable number.

6665565156 is an abundant number, since it is smaller than the sum of its proper divisors (9802302204).

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

6665565156 is a wasteful number, since it uses less digits than its factorization.

6665565156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32674363 (or 32674361 counting only the distinct ones).

The product of its digits is 4860000, while the sum is 51.

The square root of 6665565156 is about 81642.9124664230. The cubic root of 6665565156 is about 1881.9683959303.

The spelling of 6665565156 in words is "six billion, six hundred sixty-five million, five hundred sixty-five thousand, one hundred fifty-six".