6660566577 has 48 divisors (see below), whose sum is σ = 11429483520. Its totient is φ = 3797016912.

The previous prime is 6660566569. The next prime is 6660566609. The reversal of 6660566577 is 7756650666.

It is not a de Polignac number, because 6660566577 - 2³ = 6660566569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6660566557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 749124 + ... + 757962.

It is an arithmetic number, because the mean of its divisors is an integer number (238114240).

Almost surely, 2^6660566577 is an apocalyptic number.

It is an amenable number.

6660566577 is a deficient number, since it is larger than the sum of its proper divisors (4768916943).

6660566577 is an equidigital number, since it uses as much as digits as its factorization.

6660566577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9304 (or 9292 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 54.

The square root of 6660566577 is about 81612.2942760464. The cubic root of 6660566577 is about 1881.4978421725.

The spelling of 6660566577 in words is "six billion, six hundred sixty million, five hundred sixty-six thousand, five hundred seventy-seven".