5663664 has 60 divisors (see below), whose sum is σ = 16294096. Its totient is φ = 1835136.

The previous prime is 5663657. The next prime is 5663689. The reversal of 5663664 is 4663665.

5663664 is a `hidden beast` number, since 566 + 36 + 64 = 666.

5663664 is nontrivially palindromic in base 7.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4797 + ... + 5859.

Almost surely, 2^5663664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5663664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8147048).

5663664 is an abundant number, since it is smaller than the sum of its proper divisors (10630432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5663664 is a wasteful number, since it uses less digits than its factorization.

5663664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114 (or 1105 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 5663664 is about 2379.8453731283. The cubic root of 5663664 is about 178.2512128575.

Subtracting from 5663664 its reverse (4663665), we obtain a palindrome (999999).

The spelling of 5663664 in words is "five million, six hundred sixty-three thousand, six hundred sixty-four".