66110510161 has 12 divisors (see below), whose sum is σ = 69496040880. Its totient is φ = 62882775560.

The previous prime is 66110510113. The next prime is 66110510189. The reversal of 66110510161 is 16101501166.

It is not a de Polignac number, because 66110510161 - 2¹⁷ = 66110379089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66110511161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254395 + ... + 443776.

It is an arithmetic number, because the mean of its divisors is an integer number (5791336740).

Almost surely, 2^66110510161 is an apocalyptic number.

It is an amenable number.

66110510161 is a deficient number, since it is larger than the sum of its proper divisors (3385530719).

66110510161 is a wasteful number, since it uses less digits than its factorization.

66110510161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698396 (or 698373 counting only the distinct ones).

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

The spelling of 66110510161 in words is "sixty-six billion, one hundred ten million, five hundred ten thousand, one hundred sixty-one".