5665561610066 has 16 divisors (see below), whose sum is σ = 8507773310400. Its totient is φ = 2829638177520.

The previous prime is 5665561610063. The next prime is 5665561610077. The reversal of 5665561610066 is 6600161655665.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5665561610063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11179235 + ... + 11675033.

It is an arithmetic number, because the mean of its divisors is an integer number (531735831900).

Almost surely, 2^{5665561610066} is an apocalyptic number.

5665561610066 is a deficient number, since it is larger than the sum of its proper divisors (2842211700334).

5665561610066 is a wasteful number, since it uses less digits than its factorization.

5665561610066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502129.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 5665561610066 in words is "five trillion, six hundred sixty-five billion, five hundred sixty-one million, six hundred ten thousand, sixty-six".