5621366663 has 4 divisors (see below), whose sum is σ = 6132400008. Its totient is φ = 5110333320.

The previous prime is 5621366609. The next prime is 5621366669. The reversal of 5621366663 is 3666631265.

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 5621366663 - 2²⁰ = 5620318087 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 (5621366669) 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, 255516656 + ... + 255516677.

It is an arithmetic number, because the mean of its divisors is an integer number (1533100002).

Almost surely, 2^5621366663 is an apocalyptic number.

5621366663 is a deficient number, since it is larger than the sum of its proper divisors (511033345).

5621366663 is a wasteful number, since it uses less digits than its factorization.

5621366663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511033344.

The product of its digits is 699840, while the sum is 44.

The square root of 5621366663 is about 74975.7738406213. The cubic root of 5621366663 is about 1778.0636544504.

The spelling of 5621366663 in words is "five billion, six hundred twenty-one million, three hundred sixty-six thousand, six hundred sixty-three".