66105115060 has 24 divisors (see below), whose sum is σ = 146986668360. Its totient is φ = 24886631424.

The previous prime is 66105115031. The next prime is 66105115079. The reversal of 66105115060 is 6051150166.

It can be written as a sum of positive squares in 4 ways, for example, as 4661612176 + 61443502884 = 68276^2 + 247878^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97213065 + ... + 97213744.

It is an arithmetic number, because the mean of its divisors is an integer number (6124444515).

Almost surely, 2^66105115060 is an apocalyptic number.

It is an amenable number.

66105115060 is an abundant number, since it is smaller than the sum of its proper divisors (80881553300).

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

66105115060 is a wasteful number, since it uses less digits than its factorization.

66105115060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194426835 (or 194426833 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 66105115060 in words is "sixty-six billion, one hundred five million, one hundred fifteen thousand, sixty".