5766721566 has 8 divisors (see below), whose sum is σ = 11533443144. Its totient is φ = 1922240520.

The previous prime is 5766721549. The next prime is 5766721591. The reversal of 5766721566 is 6651276675.

It is a sphenic number, since it is the product of 3 distinct primes.

5766721566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480560125 + ... + 480560136.

It is an arithmetic number, because the mean of its divisors is an integer number (1441680393).

Almost surely, 2^5766721566 is an apocalyptic number.

5766721566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

5766721566 is a wasteful number, since it uses less digits than its factorization.

5766721566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961120266.

The product of its digits is 3175200, while the sum is 51.

The square root of 5766721566 is about 75938.9331370938. The cubic root of 5766721566 is about 1793.2588974308.

The spelling of 5766721566 in words is "five billion, seven hundred sixty-six million, seven hundred twenty-one thousand, five hundred sixty-six".