11609866 has 8 divisors (see below), whose sum is σ = 17430084. Its totient is φ = 5799840.

The previous prime is 11609863. The next prime is 11609869. The reversal of 11609866 is 66890611.

It is an interprime number because it is at equal distance from previous prime (11609863) and next prime (11609869).

It can be written as a sum of positive squares in 2 ways, for example, as 9272025 + 2337841 = 3045^2 + 1529^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11609863) 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, 1756 + ... + 5128.

Almost surely, 2^11609866 is an apocalyptic number.

11609866 is a deficient number, since it is larger than the sum of its proper divisors (5820218).

11609866 is a wasteful number, since it uses less digits than its factorization.

11609866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 11609866 is about 3407.3253440199. The cubic root of 11609866 is about 226.4343982703.

It can be divided in two parts, 1160 and 9866, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 11609866 in words is "eleven million, six hundred nine thousand, eight hundred sixty-six".