1660080905211 has 4 divisors (see below), whose sum is σ = 2213441206952. Its totient is φ = 1106720603472.

The previous prime is 1660080905191. The next prime is 1660080905213. The reversal of 1660080905211 is 1125090800661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1660080905211 - 2¹¹ = 1660080903163 is a prime.

It is a super-2 number, since 2×1660080905211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660080905211.

It is not an unprimeable number, because it can be changed into a prime (1660080905213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276680150866 + ... + 276680150871.

It is an arithmetic number, because the mean of its divisors is an integer number (553360301738).

Almost surely, 2^{1660080905211} is an apocalyptic number.

1660080905211 is a deficient number, since it is larger than the sum of its proper divisors (553360301741).

1660080905211 is an equidigital number, since it uses as much as digits as its factorization.

1660080905211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553360301740.

The product of its (nonzero) digits is 25920, while the sum is 39.

The spelling of 1660080905211 in words is "one trillion, six hundred sixty billion, eighty million, nine hundred five thousand, two hundred eleven".