2066705565 has 16 divisors (see below), whose sum is σ = 3310478208. Its totient is φ = 1100993216.

The previous prime is 2066705533. The next prime is 2066705569. The reversal of 2066705565 is 5655076602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2066705565 - 2⁵ = 2066705533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066705569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64362 + ... + 90971.

It is an arithmetic number, because the mean of its divisors is an integer number (206904888).

Almost surely, 2^2066705565 is an apocalyptic number.

It is an amenable number.

2066705565 is a deficient number, since it is larger than the sum of its proper divisors (1243772643).

2066705565 is a wasteful number, since it uses less digits than its factorization.

2066705565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156228.

The product of its (nonzero) digits is 378000, while the sum is 42.

The square root of 2066705565 is about 45461.0334792336. The cubic root of 2066705565 is about 1273.7754363263.

The spelling of 2066705565 in words is "two billion, sixty-six million, seven hundred five thousand, five hundred sixty-five".