5666555609 has 64 divisors (see below), whose sum is σ = 7195668480. Its totient is φ = 4388186880.

The previous prime is 5666555591. The next prime is 5666555621. The reversal of 5666555609 is 9065556665.

It is not a de Polignac number, because 5666555609 - 2⁸ = 5666555353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5666555009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14566787 + ... + 14567175.

It is an arithmetic number, because the mean of its divisors is an integer number (112432320).

Almost surely, 2^5666555609 is an apocalyptic number.

It is an amenable number.

5666555609 is a deficient number, since it is larger than the sum of its proper divisors (1529112871).

5666555609 is a wasteful number, since it uses less digits than its factorization.

5666555609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582.

The product of its (nonzero) digits is 7290000, while the sum is 53.

The square root of 5666555609 is about 75276.5276098732. The cubic root of 5666555609 is about 1782.8154334773.

The spelling of 5666555609 in words is "five billion, six hundred sixty-six million, five hundred fifty-five thousand, six hundred nine".