665204334 has 16 divisors (see below), whose sum is σ = 1345358160. Its totient is φ = 219243200.

The previous prime is 665204333. The next prime is 665204381. The reversal of 665204334 is 433402566.

It is a junction number, because it is equal to n+sod(n) for n = 665204295 and 665204304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665204333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622317 + ... + 623384.

It is an arithmetic number, because the mean of its divisors is an integer number (84084885).

Almost surely, 2^665204334 is an apocalyptic number.

665204334 is an abundant number, since it is smaller than the sum of its proper divisors (680153826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665204334 is a wasteful number, since it uses less digits than its factorization.

665204334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245795.

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 665204334 is about 25791.5554784895. Note that the first 3 decimals coincide. The cubic root of 665204334 is about 872.9412645213.

The spelling of 665204334 in words is "six hundred sixty-five million, two hundred four thousand, three hundred thirty-four".