65566466466557 has 8 divisors (see below), whose sum is σ = 79340934211776. Its totient is φ = 52893956140992.

The previous prime is 65566466466503. The next prime is 65566466466569. The reversal of 65566466466557 is 75566466466556.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65566466466557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65566466466857) 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, 275489354783 + ... + 275489355020.

It is an arithmetic number, because the mean of its divisors is an integer number (9917616776472).

Almost surely, 2^{65566466466557} is an apocalyptic number.

It is an amenable number.

65566466466557 is a deficient number, since it is larger than the sum of its proper divisors (13774467745219).

65566466466557 is a wasteful number, since it uses less digits than its factorization.

65566466466557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550978709827.

The product of its digits is 19595520000, while the sum is 77.

Subtracting 65566466466557 from its reverse (75566466466556), we obtain a palindrome (9999999999999).

The spelling of 65566466466557 in words is "sixty-five trillion, five hundred sixty-six billion, four hundred sixty-six million, four hundred sixty-six thousand, five hundred fifty-seven".