662111321 has 4 divisors (see below), whose sum is σ = 662867172. Its totient is φ = 661355472.

The previous prime is 662111311. The next prime is 662111323. The reversal of 662111321 is 123111266.

662111321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123111266 = 2 ⋅61555633.

It can be written as a sum of positive squares in 2 ways, for example, as 482417296 + 179694025 = 21964^2 + 13405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662111321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662111323) 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, 376610 + ... + 378363.

It is an arithmetic number, because the mean of its divisors is an integer number (165716793).

Almost surely, 2^662111321 is an apocalyptic number.

It is an amenable number.

662111321 is a deficient number, since it is larger than the sum of its proper divisors (755851).

662111321 is an equidigital number, since it uses as much as digits as its factorization.

662111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755850.

The product of its digits is 432, while the sum is 23.

The square root of 662111321 is about 25731.5238763661. The cubic root of 662111321 is about 871.5861850063.

Adding to 662111321 its reverse (123111266), we get a palindrome (785222587).

The spelling of 662111321 in words is "six hundred sixty-two million, one hundred eleven thousand, three hundred twenty-one".