1566161105 has 4 divisors (see below), whose sum is σ = 1879393332. Its totient is φ = 1252928880.

The previous prime is 1566161099. The next prime is 1566161111. The reversal of 1566161105 is 5011616651.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1566161099) and next prime (1566161111).

It can be written as a sum of positive squares in 2 ways, for example, as 369831361 + 1196329744 = 19231^2 + 34588^2 .

It is not a de Polignac number, because 1566161105 - 2²⁶ = 1499052241 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 156616106 + ... + 156616115.

It is an arithmetic number, because the mean of its divisors is an integer number (469848333).

Almost surely, 2^1566161105 is an apocalyptic number.

It is an amenable number.

1566161105 is a deficient number, since it is larger than the sum of its proper divisors (313232227).

1566161105 is an equidigital number, since it uses as much as digits as its factorization.

1566161105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313232226.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1566161105 is about 39574.7533788904. The cubic root of 1566161105 is about 1161.3028131460.

Adding to 1566161105 its reverse (5011616651), we get a palindrome (6577777756).

The spelling of 1566161105 in words is "one billion, five hundred sixty-six million, one hundred sixty-one thousand, one hundred five".