665636016 has 20 divisors (see below), whose sum is σ = 1719559832. Its totient is φ = 221878656.

The previous prime is 665635981. The next prime is 665636029. The reversal of 665636016 is 610636566.

665636016 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 3 ways as a sum of consecutive naturals, for example, 6933661 + ... + 6933756.

Almost surely, 2^665636016 is an apocalyptic number.

It is an amenable number.

665636016 is an abundant number, since it is smaller than the sum of its proper divisors (1053923816).

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

665636016 is a wasteful number, since it uses less digits than its factorization.

665636016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13867428 (or 13867422 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 665636016 is about 25799.9227905821. The cubic root of 665636016 is about 873.1300544045.

The spelling of 665636016 in words is "six hundred sixty-five million, six hundred thirty-six thousand, sixteen".