656553 has 8 divisors (see below), whose sum is σ = 885600. Its totient is φ = 432608.

The previous prime is 656527. The next prime is 656561. The reversal of 656553 is 355656.

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 656553 - 2⁸ = 656297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 656553.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963 + ... + 1496.

It is an arithmetic number, because the mean of its divisors is an integer number (110700).

2⁶⁵⁶⁵⁵³ is an apocalyptic number.

It is an amenable number.

656553 is a deficient number, since it is larger than the sum of its proper divisors (229047).

656553 is a wasteful number, since it uses less digits than its factorization.

656553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551.

The product of its digits is 13500, while the sum is 30.

The square root of 656553 is about 810.2795813792. The cubic root of 656553 is about 86.9140384906.

The spelling of 656553 in words is "six hundred fifty-six thousand, five hundred fifty-three".