656806224 has 80 divisors (see below), whose sum is σ = 1759512384. Its totient is φ = 210969600.

The previous prime is 656806223. The next prime is 656806243. The reversal of 656806224 is 422608656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656806223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161334 + ... + 165354.

Almost surely, 2^656806224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656806224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879756192).

656806224 is an abundant number, since it is smaller than the sum of its proper divisors (1102706160).

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

656806224 is a wasteful number, since it uses less digits than its factorization.

656806224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156 (or 4150 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 656806224 is about 25628.2309963056. The cubic root of 656806224 is about 869.2521092789.

The spelling of 656806224 in words is "six hundred fifty-six million, eight hundred six thousand, two hundred twenty-four".