1660276755065 has 4 divisors (see below), whose sum is σ = 1992332106084. Its totient is φ = 1328221404048.

The previous prime is 1660276755037. The next prime is 1660276755073. The reversal of 1660276755065 is 5605576720661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 987058146064 + 673218609001 = 993508^2 + 820499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660276755065 - 2⁶ = 1660276755001 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 1660276755065.

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 3 ways as a sum of consecutive naturals, for example, 166027675502 + ... + 166027675511.

It is an arithmetic number, because the mean of its divisors is an integer number (498083026521).

Almost surely, 2^{1660276755065} is an apocalyptic number.

It is an amenable number.

1660276755065 is a deficient number, since it is larger than the sum of its proper divisors (332055351019).

1660276755065 is an equidigital number, since it uses as much as digits as its factorization.

1660276755065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332055351018.

The product of its (nonzero) digits is 15876000, while the sum is 56.

The spelling of 1660276755065 in words is "one trillion, six hundred sixty billion, two hundred seventy-six million, seven hundred fifty-five thousand, sixty-five".