66105115059980 has 48 divisors (see below), whose sum is σ = 139065194886240. Its totient is φ = 26395492032000.

The previous prime is 66105115059979. The next prime is 66105115060001. The reversal of 66105115059980 is 8995051150166.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126321506 + ... + 126843734.

It is an arithmetic number, because the mean of its divisors is an integer number (2897191560130).

Almost surely, 2^{66105115059980} is an apocalyptic number.

It is an amenable number.

66105115059980 is an abundant number, since it is smaller than the sum of its proper divisors (72960079826260).

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

66105115059980 is a wasteful number, since it uses less digits than its factorization.

66105115059980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533370 (or 533368 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 56.

The spelling of 66105115059980 in words is "sixty-six trillion, one hundred five billion, one hundred fifteen million, fifty-nine thousand, nine hundred eighty".