11636661 has 16 divisors (see below), whose sum is σ = 16087680. Its totient is φ = 7476480.

The previous prime is 11636659. The next prime is 11636693. The reversal of 11636661 is 16663611.

It is not a de Polignac number, because 11636661 - 2¹ = 11636659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11636641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10416 + ... + 11478.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^11636661 is an apocalyptic number.

It is an amenable number.

11636661 is a deficient number, since it is larger than the sum of its proper divisors (4451019).

11636661 is a wasteful number, since it uses less digits than its factorization.

11636661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196.

The product of its digits is 3888, while the sum is 30.

The square root of 11636661 is about 3411.2550476328. The cubic root of 11636661 is about 226.6084642470.

The spelling of 11636661 in words is "eleven million, six hundred thirty-six thousand, six hundred sixty-one".