665025204 has 12 divisors (see below), whose sum is σ = 1551725504. Its totient is φ = 221675064.

The previous prime is 665025199. The next prime is 665025209. The reversal of 665025204 is 402520566.

It is an interprime number because it is at equal distance from previous prime (665025199) and next prime (665025209).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665025209) 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 3 ways as a sum of consecutive naturals, for example, 27709372 + ... + 27709395.

Almost surely, 2^665025204 is an apocalyptic number.

It is an amenable number.

665025204 is an abundant number, since it is smaller than the sum of its proper divisors (886700300).

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

665025204 is a wasteful number, since it uses less digits than its factorization.

665025204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55418774 (or 55418772 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 665025204 is about 25788.0825964243. The cubic root of 665025204 is about 872.8629006267.

The spelling of 665025204 in words is "six hundred sixty-five million, twenty-five thousand, two hundred four".