66560516155165 has 8 divisors (see below), whose sum is σ = 79872778833408. Its totient is φ = 53248306626000.

The previous prime is 66560516155157. The next prime is 66560516155169. The reversal of 66560516155165 is 56155161506566.

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

It is not a de Polignac number, because 66560516155165 - 2³ = 66560516155157 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 (66560516155169) 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, 10478137 + ... + 15585646.

It is an arithmetic number, because the mean of its divisors is an integer number (9984097354176).

Almost surely, 2^{66560516155165} is an apocalyptic number.

It is an amenable number.

66560516155165 is a deficient number, since it is larger than the sum of its proper divisors (13312262678243).

66560516155165 is a wasteful number, since it uses less digits than its factorization.

66560516155165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26574539.

The product of its (nonzero) digits is 24300000, while the sum is 58.

The spelling of 66560516155165 in words is "sixty-six trillion, five hundred sixty billion, five hundred sixteen million, one hundred fifty-five thousand, one hundred sixty-five".