11663656 has 8 divisors (see below), whose sum is σ = 21869370. Its totient is φ = 5831824.

The previous prime is 11663653. The next prime is 11663669. The reversal of 11663656 is 65636611.

11663656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10304100 + 1359556 = 3210^2 + 1166^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (11663653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728971 + ... + 728986.

Almost surely, 2^11663656 is an apocalyptic number.

It is an amenable number.

11663656 is a deficient number, since it is larger than the sum of its proper divisors (10205714).

11663656 is a wasteful number, since it uses less digits than its factorization.

11663656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457963 (or 1457959 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 11663656 is about 3415.2095104107. The cubic root of 11663656 is about 226.7835594692.

The spelling of 11663656 in words is "eleven million, six hundred sixty-three thousand, six hundred fifty-six".