665322241 has 4 divisors (see below), whose sum is σ = 665385984. Its totient is φ = 665258500.

The previous prime is 665322233. The next prime is 665322257. The reversal of 665322241 is 142223566.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 665322241 - 2³ = 665322233 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665329241) 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, 12145 + ... + 38446.

It is an arithmetic number, because the mean of its divisors is an integer number (166346496).

Almost surely, 2^665322241 is an apocalyptic number.

It is an amenable number.

665322241 is a deficient number, since it is larger than the sum of its proper divisors (63743).

665322241 is a wasteful number, since it uses less digits than its factorization.

665322241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63742.

The product of its digits is 17280, while the sum is 31.

The square root of 665322241 is about 25793.8411447384. The cubic root of 665322241 is about 872.9928375492.

The spelling of 665322241 in words is "six hundred sixty-five million, three hundred twenty-two thousand, two hundred forty-one".