665983912 has 32 divisors (see below), whose sum is σ = 1406188800. Its totient is φ = 292953600.

The previous prime is 665983897. The next prime is 665983939. The reversal of 665983912 is 219389566.

665983912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 119337 + ... + 124792.

It is an arithmetic number, because the mean of its divisors is an integer number (43943400).

Almost surely, 2^665983912 is an apocalyptic number.

665983912 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

665983912 is an abundant number, since it is smaller than the sum of its proper divisors (740204888).

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

665983912 is a wasteful number, since it uses less digits than its factorization.

665983912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244177 (or 244173 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The square root of 665983912 is about 25806.6641005768. The cubic root of 665983912 is about 873.2821423031.

The spelling of 665983912 in words is "six hundred sixty-five million, nine hundred eighty-three thousand, nine hundred twelve".