11663621 has 8 divisors (see below), whose sum is σ = 12259104. Its totient is φ = 11082960.

The previous prime is 11663611. The next prime is 11663633. The reversal of 11663621 is 12636611.

11663621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11663621 - 2²² = 7469317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11663611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2075 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (1532388).

Almost surely, 2^11663621 is an apocalyptic number.

It is an amenable number.

11663621 is a deficient number, since it is larger than the sum of its proper divisors (595483).

11663621 is an equidigital number, since it uses as much as digits as its factorization.

11663621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7411.

The product of its digits is 1296, while the sum is 26.

The square root of 11663621 is about 3415.2043862703. The cubic root of 11663621 is about 226.7833326269.

The spelling of 11663621 in words is "eleven million, six hundred sixty-three thousand, six hundred twenty-one".