66511010161 has 8 divisors (see below), whose sum is σ = 69773572800. Its totient is φ = 63313052880.

The previous prime is 66511010143. The next prime is 66511010191. The reversal of 66511010161 is 16101011566.

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

It is not a de Polignac number, because 66511010161 - 2²³ = 66502621553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66511010191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16149231 + ... + 16153348.

It is an arithmetic number, because the mean of its divisors is an integer number (8721696600).

Almost surely, 2^66511010161 is an apocalyptic number.

It is an amenable number.

66511010161 is a deficient number, since it is larger than the sum of its proper divisors (3262562639).

66511010161 is a wasteful number, since it uses less digits than its factorization.

66511010161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32302679.

The product of its (nonzero) digits is 1080, while the sum is 28.

The spelling of 66511010161 in words is "sixty-six billion, five hundred eleven million, ten thousand, one hundred sixty-one".