11566601 has 2 divisors, whose sum is σ = 11566602. Its totient is φ = 11566600.

The previous prime is 11566549. The next prime is 11566603. The reversal of 11566601 is 10666511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10758400 + 808201 = 3280^2 + 899^2 .

It is a cyclic number.

It is not a de Polignac number, because 11566601 - 2¹⁸ = 11304457 is a prime.

Together with 11566603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11566603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5783300 + 5783301.

It is an arithmetic number, because the mean of its divisors is an integer number (5783301).

Almost surely, 2^11566601 is an apocalyptic number.

It is an amenable number.

11566601 is a deficient number, since it is larger than the sum of its proper divisors (1).

11566601 is an equidigital number, since it uses as much as digits as its factorization.

11566601 is an odious number, because the sum of its binary digits is odd.

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

The square root of 11566601 is about 3400.9705967562. The cubic root of 11566601 is about 226.1527734624.

It can be divided in two parts, 11566 and 601, that added together give a cube (12167 = 23³).

The spelling of 11566601 in words is "eleven million, five hundred sixty-six thousand, six hundred one".