1660049161 has 4 divisors (see below), whose sum is σ = 1672721424. Its totient is φ = 1647376900.

The previous prime is 1660049159. The next prime is 1660049177. The reversal of 1660049161 is 1619400661.

It is a happy number.

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 1660049161 - 2¹ = 1660049159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660049191) 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, 6335935 + ... + 6336196.

It is an arithmetic number, because the mean of its divisors is an integer number (418180356).

Almost surely, 2^1660049161 is an apocalyptic number.

It is an amenable number.

1660049161 is a deficient number, since it is larger than the sum of its proper divisors (12672263).

1660049161 is a wasteful number, since it uses less digits than its factorization.

1660049161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12672262.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1660049161 is about 40743.7008751046. The cubic root of 1660049161 is about 1184.0598359799.

The spelling of 1660049161 in words is "one billion, six hundred sixty million, forty-nine thousand, one hundred sixty-one".