11566061 has 4 divisors (see below), whose sum is σ = 12455772. Its totient is φ = 10676352.

The previous prime is 11566057. The next prime is 11566073. The reversal of 11566061 is 16066511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16066511 = 317 ⋅50683.

It can be written as a sum of positive squares in 2 ways, for example, as 3976036 + 7590025 = 1994^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 11566061 - 2² = 11566057 is a prime.

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 11566061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11566021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444836 + ... + 444861.

It is an arithmetic number, because the mean of its divisors is an integer number (3113943).

Almost surely, 2^11566061 is an apocalyptic number.

It is an amenable number.

11566061 is a deficient number, since it is larger than the sum of its proper divisors (889711).

11566061 is an equidigital number, since it uses as much as digits as its factorization.

11566061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889710.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 11566061 is about 3400.8912067280. The cubic root of 11566061 is about 226.1492540073.

The spelling of 11566061 in words is "eleven million, five hundred sixty-six thousand, sixty-one".