665224405 has 8 divisors (see below), whose sum is σ = 816833952. Its totient is φ = 519803088.

The previous prime is 665224379. The next prime is 665224411. The reversal of 665224405 is 504422566.

665224405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665224405 - 2¹³ = 665216213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1546819 + ... + 1547248.

It is an arithmetic number, because the mean of its divisors is an integer number (102104244).

Almost surely, 2^665224405 is an apocalyptic number.

It is an amenable number.

665224405 is a deficient number, since it is larger than the sum of its proper divisors (151609547).

665224405 is a wasteful number, since it uses less digits than its factorization.

665224405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094115.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 665224405 is about 25791.9445757779. The cubic root of 665224405 is about 872.9500440932.

The spelling of 665224405 in words is "six hundred sixty-five million, two hundred twenty-four thousand, four hundred five".