6556166065 has 16 divisors (see below), whose sum is σ = 8038321920. Its totient is φ = 5131082880.

The previous prime is 6556166063. The next prime is 6556166069. The reversal of 6556166065 is 5606616556.

It is not a de Polignac number, because 6556166065 - 2¹ = 6556166063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6556166063) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 704845 + ... + 714085.

It is an arithmetic number, because the mean of its divisors is an integer number (502395120).

Almost surely, 2^6556166065 is an apocalyptic number.

It is an amenable number.

6556166065 is a deficient number, since it is larger than the sum of its proper divisors (1482155855).

6556166065 is a wasteful number, since it uses less digits than its factorization.

6556166065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12312.

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 6556166065 is about 80970.1553969115. The cubic root of 6556166065 is about 1871.6155660140.

The spelling of 6556166065 in words is "six billion, five hundred fifty-six million, one hundred sixty-six thousand, sixty-five".