11660362261 has 4 divisors (see below), whose sum is σ = 11664634624. Its totient is φ = 11656089900.

The previous prime is 11660362213. The next prime is 11660362267. The reversal of 11660362261 is 16226306611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16226306611 = 7019 ⋅2311769.

It is a cyclic number.

It is not a de Polignac number, because 11660362261 - 2¹¹ = 11660360213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11660362267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2132085 + ... + 2137546.

It is an arithmetic number, because the mean of its divisors is an integer number (2916158656).

Almost surely, 2^11660362261 is an apocalyptic number.

It is an amenable number.

11660362261 is a deficient number, since it is larger than the sum of its proper divisors (4272363).

11660362261 is an equidigital number, since it uses as much as digits as its factorization.

11660362261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272362.

The product of its (nonzero) digits is 15552, while the sum is 34.

Adding to 11660362261 its reverse (16226306611), we get a palindrome (27886668872).

The spelling of 11660362261 in words is "eleven billion, six hundred sixty million, three hundred sixty-two thousand, two hundred sixty-one".