2166565422165 has 8 divisors (see below), whose sum is σ = 3466504675488. Its totient is φ = 1155501558480.

The previous prime is 2166565422113. The next prime is 2166565422173. The reversal of 2166565422165 is 5612245656612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2166565422165 - 2⁷ = 2166565422037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72218847391 + ... + 72218847420.

It is an arithmetic number, because the mean of its divisors is an integer number (433313084436).

Almost surely, 2^{2166565422165} is an apocalyptic number.

It is an amenable number.

2166565422165 is a deficient number, since it is larger than the sum of its proper divisors (1299939253323).

2166565422165 is a wasteful number, since it uses less digits than its factorization.

2166565422165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144437694819.

The product of its digits is 5184000, while the sum is 51.

The spelling of 2166565422165 in words is "two trillion, one hundred sixty-six billion, five hundred sixty-five million, four hundred twenty-two thousand, one hundred sixty-five".