665366408 has 32 divisors (see below), whose sum is σ = 1428960000. Its totient is φ = 284522112.

The previous prime is 665366407. The next prime is 665366431. The reversal of 665366408 is 804663566.

665366408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (665366407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12593 + ... + 38591.

It is an arithmetic number, because the mean of its divisors is an integer number (44655000).

Almost surely, 2^665366408 is an apocalyptic number.

It is an amenable number.

665366408 is an abundant number, since it is smaller than the sum of its proper divisors (763593592).

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

665366408 is a wasteful number, since it uses less digits than its factorization.

665366408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26469 (or 26465 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 665366408 is about 25794.6972845195. The cubic root of 665366408 is about 873.0121548159.

The spelling of 665366408 in words is "six hundred sixty-five million, three hundred sixty-six thousand, four hundred eight".