665451016 has 32 divisors (see below), whose sum is σ = 1257379200. Its totient is φ = 330161920.

The previous prime is 665451001. The next prime is 665451091. The reversal of 665451016 is 610154566.

It is a happy number.

665451016 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, 754896 + ... + 755776.

It is an arithmetic number, because the mean of its divisors is an integer number (39293100).

Almost surely, 2^665451016 is an apocalyptic number.

It is an amenable number.

665451016 is a deficient number, since it is larger than the sum of its proper divisors (591928184).

665451016 is a wasteful number, since it uses less digits than its factorization.

665451016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509 (or 1505 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 665451016 is about 25796.3372593863. The cubic root of 665451016 is about 873.0491573260.

The spelling of 665451016 in words is "six hundred sixty-five million, four hundred fifty-one thousand, sixteen".