5606656500666 has 32 divisors (see below), whose sum is σ = 12600913610880. Its totient is φ = 1650119638464.

The previous prime is 5606656500661. The next prime is 5606656500701. The reversal of 5606656500666 is 6660056566065.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5606656500661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1562611501 + ... + 1562615088.

It is an arithmetic number, because the mean of its divisors is an integer number (393778550340).

Almost surely, 2^{5606656500666} is an apocalyptic number.

5606656500666 is an abundant number, since it is smaller than the sum of its proper divisors (6994257110214).

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

5606656500666 is a wasteful number, since it uses less digits than its factorization.

5606656500666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125226630.

The product of its (nonzero) digits is 34992000, while the sum is 57.

The spelling of 5606656500666 in words is "five trillion, six hundred six billion, six hundred fifty-six million, five hundred thousand, six hundred sixty-six".