656784223 has 8 divisors (see below), whose sum is σ = 661912560. Its totient is φ = 651668160.

The previous prime is 656784221. The next prime is 656784253. The reversal of 656784223 is 322487656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656784223 - 2¹ = 656784221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 656784223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656784221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124428 + ... + 129598.

It is an arithmetic number, because the mean of its divisors is an integer number (82739070).

Almost surely, 2^656784223 is an apocalyptic number.

656784223 is a deficient number, since it is larger than the sum of its proper divisors (5128337).

656784223 is a wasteful number, since it uses less digits than its factorization.

656784223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6137.

The product of its digits is 483840, while the sum is 43.

The square root of 656784223 is about 25627.8017590272. The cubic root of 656784223 is about 869.2424034080.

The spelling of 656784223 in words is "six hundred fifty-six million, seven hundred eighty-four thousand, two hundred twenty-three".