10665863321 has 4 divisors (see below), whose sum is σ = 10666569600. Its totient is φ = 10665157044.

The previous prime is 10665863311. The next prime is 10665863333. The reversal of 10665863321 is 12336856601.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12336856601 = 2833 ⋅4354697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10665863321 is a prime.

It is a super-2 number, since 2×10665863321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10665863311) 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, 329981 + ... + 360858.

It is an arithmetic number, because the mean of its divisors is an integer number (2666642400).

Almost surely, 2^10665863321 is an apocalyptic number.

It is an amenable number.

10665863321 is a deficient number, since it is larger than the sum of its proper divisors (706279).

10665863321 is an equidigital number, since it uses as much as digits as its factorization.

10665863321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706278.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 10665863321 in words is "ten billion, six hundred sixty-five million, eight hundred sixty-three thousand, three hundred twenty-one".