66616565110160 has 120 divisors (see below), whose sum is σ = 172246915659240. Its totient is φ = 23932104708096.

The previous prime is 66616565110063. The next prime is 66616565110169. The reversal of 66616565110160 is 6101156561666.

It can be written as a sum of positive squares in 12 ways, for example, as 34552341759376 + 32064223350784 = 5878124^2 + 5662528^2 .

It is a super-2 number, since 2×66616565110160² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66616565110099 and 66616565110108.

It is not an unprimeable number, because it can be changed into a prime (66616565110169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66084365 + ... + 67084844.

It is an arithmetic number, because the mean of its divisors is an integer number (1435390963827).

Almost surely, 2^{66616565110160} is an apocalyptic number.

It is an amenable number.

66616565110160 is an abundant number, since it is smaller than the sum of its proper divisors (105630350549080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66616565110160 is a wasteful number, since it uses less digits than its factorization.

66616565110160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133169285 (or 133169266 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 66616565110160 in words is "sixty-six trillion, six hundred sixteen billion, five hundred sixty-five million, one hundred ten thousand, one hundred sixty".