1660141561441 has 4 divisors (see below), whose sum is σ = 1811063521584. Its totient is φ = 1509219601300.

The previous prime is 1660141561433. The next prime is 1660141561543. The reversal of 1660141561441 is 1441651410661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1660141561441 - 2³ = 1660141561433 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1660141561394 and 1660141561403.

It is not an unprimeable number, because it can be changed into a prime (1660141565441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75460980055 + ... + 75460980076.

It is an arithmetic number, because the mean of its divisors is an integer number (452765880396).

Almost surely, 2^{1660141561441} is an apocalyptic number.

1660141561441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1660141561441 is a deficient number, since it is larger than the sum of its proper divisors (150921960143).

1660141561441 is a wasteful number, since it uses less digits than its factorization.

1660141561441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150921960142.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 1660141561441 in words is "one trillion, six hundred sixty billion, one hundred forty-one million, five hundred sixty-one thousand, four hundred forty-one".