1661107061116 has 24 divisors (see below), whose sum is σ = 2969040626496. Its totient is φ = 812812757760.

The previous prime is 1661107061077. The next prime is 1661107061167. The reversal of 1661107061116 is 6111607011661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1865296 + ... + 2607976.

It is an arithmetic number, because the mean of its divisors is an integer number (123710026104).

Almost surely, 2^{1661107061116} is an apocalyptic number.

It is an amenable number.

1661107061116 is a deficient number, since it is larger than the sum of its proper divisors (1307933565380).

1661107061116 is a wasteful number, since it uses less digits than its factorization.

1661107061116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754629 (or 754627 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 1661107061116 in words is "one trillion, six hundred sixty-one billion, one hundred seven million, sixty-one thousand, one hundred sixteen".