1660205163 has 4 divisors (see below), whose sum is σ = 2213606888. Its totient is φ = 1106803440.

The previous prime is 1660205147. The next prime is 1660205177. The reversal of 1660205163 is 3615020661.

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

It is not a de Polignac number, because 1660205163 - 2⁴ = 1660205147 is a prime.

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 1660205163.

It is not an unprimeable number, because it can be changed into a prime (1660205263) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 276700858 + ... + 276700863.

It is an arithmetic number, because the mean of its divisors is an integer number (553401722).

Almost surely, 2^1660205163 is an apocalyptic number.

1660205163 is a deficient number, since it is larger than the sum of its proper divisors (553401725).

1660205163 is an equidigital number, since it uses as much as digits as its factorization.

1660205163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553401724.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1660205163 is about 40745.6152610315. The cubic root of 1660205163 is about 1184.0969252262.

The spelling of 1660205163 in words is "one billion, six hundred sixty million, two hundred five thousand, one hundred sixty-three".