11663644 has 12 divisors (see below), whose sum is σ = 21485800. Its totient is φ = 5524848.

The previous prime is 11663633. The next prime is 11663647. The reversal of 11663644 is 44636611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11663647) 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, 76659 + ... + 76810.

Almost surely, 2^11663644 is an apocalyptic number.

It is an amenable number.

11663644 is a deficient number, since it is larger than the sum of its proper divisors (9822156).

11663644 is a wasteful number, since it uses less digits than its factorization.

11663644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153492 (or 153490 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 11663644 is about 3415.2077535635. The cubic root of 11663644 is about 226.7834816948.

The spelling of 11663644 in words is "eleven million, six hundred sixty-three thousand, six hundred forty-four".