665682304 has 32 divisors (see below), whose sum is σ = 1515618000. Its totient is φ = 285292032.

The previous prime is 665682299. The next prime is 665682317. The reversal of 665682304 is 403286566.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370579 + ... + 372370.

Almost surely, 2^665682304 is an apocalyptic number.

665682304 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

665682304 is an abundant number, since it is smaller than the sum of its proper divisors (849935696).

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

665682304 is an equidigital number, since it uses as much as digits as its factorization.

665682304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742970 (or 742958 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 665682304 is about 25800.8198319356. The cubic root of 665682304 is about 873.1502929463.

The spelling of 665682304 in words is "six hundred sixty-five million, six hundred eighty-two thousand, three hundred four".