10665120205 has 4 divisors (see below), whose sum is σ = 12798144252. Its totient is φ = 8532096160.

The previous prime is 10665120157. The next prime is 10665120239. The reversal of 10665120205 is 50202156601.

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 6770985796 + 3894134409 = 82286^2 + 62403^2 .

It is not a de Polignac number, because 10665120205 - 2¹³ = 10665112013 is a prime.

It is a super-2 number, since 2×10665120205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1066512016 + ... + 1066512025.

It is an arithmetic number, because the mean of its divisors is an integer number (3199536063).

Almost surely, 2^10665120205 is an apocalyptic number.

It is an amenable number.

10665120205 is a deficient number, since it is larger than the sum of its proper divisors (2133024047).

10665120205 is an equidigital number, since it uses as much as digits as its factorization.

10665120205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133024046.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 10665120205 its reverse (50202156601), we get a palindrome (60867276806).

The spelling of 10665120205 in words is "ten billion, six hundred sixty-five million, one hundred twenty thousand, two hundred five".