2165566562 has 16 divisors (see below), whose sum is σ = 3392694720. Its totient is φ = 1035660528.

The previous prime is 2165566531. The next prime is 2165566589. The reversal of 2165566562 is 2656655612.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 243638 + ... + 252369.

It is an arithmetic number, because the mean of its divisors is an integer number (212043420).

Almost surely, 2^2165566562 is an apocalyptic number.

2165566562 is a deficient number, since it is larger than the sum of its proper divisors (1227128158).

2165566562 is a wasteful number, since it uses less digits than its factorization.

2165566562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496105.

The product of its digits is 648000, while the sum is 44.

The square root of 2165566562 is about 46535.6482924650. The cubic root of 2165566562 is about 1293.7703053843.

The spelling of 2165566562 in words is "two billion, one hundred sixty-five million, five hundred sixty-six thousand, five hundred sixty-two".