1980108312066 has 48 divisors (see below), whose sum is σ = 4486964676480. Its totient is φ = 629900694720.

The previous prime is 1980108312053. The next prime is 1980108312067. The reversal of 1980108312066 is 6602138010891.

It is not an unprimeable number, because it can be changed into a prime (1980108312067) 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, 5265715 + ... + 5629206.

It is an arithmetic number, because the mean of its divisors is an integer number (93478430760).

Almost surely, 2^{1980108312066} is an apocalyptic number.

1980108312066 is an abundant number, since it is smaller than the sum of its proper divisors (2506856364414).

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

1980108312066 is a wasteful number, since it uses less digits than its factorization.

1980108312066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10895391 (or 10895388 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 1980108312066 in words is "one trillion, nine hundred eighty billion, one hundred eight million, three hundred twelve thousand, sixty-six".