5621663 has 4 divisors (see below), whose sum is σ = 5917560. Its totient is φ = 5325768.

The previous prime is 5621653. The next prime is 5621687. The reversal of 5621663 is 3661265.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5621663 - 2⁶ = 5621599 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 (5621653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147920 + ... + 147957.

It is an arithmetic number, because the mean of its divisors is an integer number (1479390).

Almost surely, 2^5621663 is an apocalyptic number.

5621663 is a deficient number, since it is larger than the sum of its proper divisors (295897).

5621663 is a wasteful number, since it uses less digits than its factorization.

5621663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295896.

The product of its digits is 6480, while the sum is 29.

The square root of 5621663 is about 2371.0046393881. The cubic root of 5621663 is about 177.8094898145.

The spelling of 5621663 in words is "five million, six hundred twenty-one thousand, six hundred sixty-three".