657796216 has 32 divisors (see below), whose sum is σ = 1537706880. Its totient is φ = 256284000.

The previous prime is 657796193. The next prime is 657796219. The reversal of 657796216 is 612697756.

657796216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 657796216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657796219) 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, 533310 + ... + 534541.

It is an arithmetic number, because the mean of its divisors is an integer number (48053340).

Almost surely, 2^657796216 is an apocalyptic number.

It is an amenable number.

657796216 is an abundant number, since it is smaller than the sum of its proper divisors (879910664).

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

657796216 is a wasteful number, since it uses less digits than its factorization.

657796216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067875 (or 1067871 counting only the distinct ones).

The product of its digits is 952560, while the sum is 49.

The square root of 657796216 is about 25647.5382054497. The cubic root of 657796216 is about 869.6886259659.

The spelling of 657796216 in words is "six hundred fifty-seven million, seven hundred ninety-six thousand, two hundred sixteen".