5566842621 has 6 divisors (see below), whose sum is σ = 8040994910. Its totient is φ = 3711228408.

The previous prime is 5566842599. The next prime is 5566842647. The reversal of 5566842621 is 1262486655.

5566842621 is a `hidden beast` number, since 5 + 566 + 84 + 2 + 6 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3524796900 + 2042045721 = 59370^2 + 45189^2 .

It is not a de Polignac number, because 5566842621 - 2¹⁹ = 5566318333 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 (5566847621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 309269026 + ... + 309269043.

Almost surely, 2^5566842621 is an apocalyptic number.

It is an amenable number.

5566842621 is a deficient number, since it is larger than the sum of its proper divisors (2474152289).

5566842621 is a wasteful number, since it uses less digits than its factorization.

5566842621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618538075 (or 618538072 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 5566842621 is about 74611.2767683277. The cubic root of 5566842621 is about 1772.2962336190.

It can be divided in two parts, 55668 and 42621, that added together give a palindrome (98289).

The spelling of 5566842621 in words is "five billion, five hundred sixty-six million, eight hundred forty-two thousand, six hundred twenty-one".