10665304621 has 4 divisors (see below), whose sum is σ = 10925434044. Its totient is φ = 10405175200.

The previous prime is 10665304613. The next prime is 10665304673. The reversal of 10665304621 is 12640356601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12640356601 = 9689 ⋅1304609.

It can be written as a sum of positive squares in 2 ways, for example, as 139570596 + 10525734025 = 11814^2 + 102595^2 .

It is a cyclic number.

It is not a de Polignac number, because 10665304621 - 2³ = 10665304613 is a prime.

It is a super-2 number, since 2×10665304621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10665304691) by changing a digit.

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, 130064650 + ... + 130064731.

It is an arithmetic number, because the mean of its divisors is an integer number (2731358511).

Almost surely, 2^10665304621 is an apocalyptic number.

It is an amenable number.

10665304621 is a deficient number, since it is larger than the sum of its proper divisors (260129423).

10665304621 is an equidigital number, since it uses as much as digits as its factorization.

10665304621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260129422.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 10665304621 in words is "ten billion, six hundred sixty-five million, three hundred four thousand, six hundred twenty-one".