5581866006 has 36 divisors (see below), whose sum is σ = 12545672412. Its totient is φ = 1860072984.

The previous prime is 5581865987. The next prime is 5581866013. The reversal of 5581866006 is 6006681855.

5581866006 is a `hidden beast` number, since 5 + 581 + 8 + 6 + 60 + 0 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1645360 + ... + 1648748.

Almost surely, 2^5581866006 is an apocalyptic number.

5581866006 is an abundant number, since it is smaller than the sum of its proper divisors (6963806406).

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

5581866006 is an frugal number, since it uses more digits than its factorization.

5581866006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795 (or 3394 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 5581866006 is about 74711.8866446297. The cubic root of 5581866006 is about 1773.8891157555.

The spelling of 5581866006 in words is "five billion, five hundred eighty-one million, eight hundred sixty-six thousand, six".