11660261 has 2 divisors, whose sum is σ = 11660262. Its totient is φ = 11660260.

The previous prime is 11660227. The next prime is 11660263. The reversal of 11660261 is 16206611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9728161 + 1932100 = 3119^2 + 1390^2 .

It is an emirp because it is prime and its reverse (16206611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11660261 - 2⁶ = 11660197 is a prime.

It is a Sophie Germain prime.

Together with 11660263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11660263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830130 + 5830131.

It is an arithmetic number, because the mean of its divisors is an integer number (5830131).

Almost surely, 2^11660261 is an apocalyptic number.

It is an amenable number.

11660261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11660261 is an equidigital number, since it uses as much as digits as its factorization.

11660261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 11660261 is about 3414.7124329876. The cubic root of 11660261 is about 226.7615536505.

Adding to 11660261 its reverse (16206611), we get a palindrome (27866872).

The spelling of 11660261 in words is "eleven million, six hundred sixty thousand, two hundred sixty-one".