11663641 has 8 divisors (see below), whose sum is σ = 12751200. Its totient is φ = 10580640.

The previous prime is 11663633. The next prime is 11663647. The reversal of 11663641 is 14636611.

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

It is a cyclic number.

It is not a de Polignac number, because 11663641 - 2³ = 11663633 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 6445 + ... + 8053.

It is an arithmetic number, because the mean of its divisors is an integer number (1593900).

Almost surely, 2^11663641 is an apocalyptic number.

11663641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11663641 is a deficient number, since it is larger than the sum of its proper divisors (1087559).

11663641 is a wasteful number, since it uses less digits than its factorization.

11663641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279.

The product of its digits is 2592, while the sum is 28.

The square root of 11663641 is about 3415.2073143515. The cubic root of 11663641 is about 226.7834622512.

The spelling of 11663641 in words is "eleven million, six hundred sixty-three thousand, six hundred forty-one".