11566065061 has 8 divisors (see below), whose sum is σ = 11901480984. Its totient is φ = 11231850240.

The previous prime is 11566065047. The next prime is 11566065083. The reversal of 11566065061 is 16056066511.

It can be written as a sum of positive squares in 4 ways, for example, as 243828225 + 11322236836 = 15615^2 + 106406^2 .

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

It is not a de Polignac number, because 11566065061 - 2¹⁹ = 11565540773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11566065061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11566065661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280720 + ... + 319273.

It is an arithmetic number, because the mean of its divisors is an integer number (1487685123).

Almost surely, 2^11566065061 is an apocalyptic number.

It is an amenable number.

11566065061 is a deficient number, since it is larger than the sum of its proper divisors (335415923).

11566065061 is an equidigital number, since it uses as much as digits as its factorization.

11566065061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600551.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 11566065061 in words is "eleven billion, five hundred sixty-six million, sixty-five thousand, sixty-one".