656633 has 4 divisors (see below), whose sum is σ = 659328. Its totient is φ = 653940.

The previous prime is 656609. The next prime is 656651. The reversal of 656633 is 336656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 656633 - 2⁸ = 656377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656596 and 656605.

It is not an unprimeable number, because it can be changed into a prime (656603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 941 + ... + 1482.

It is an arithmetic number, because the mean of its divisors is an integer number (164832).

2⁶⁵⁶⁶³³ is an apocalyptic number.

It is an amenable number.

656633 is a deficient number, since it is larger than the sum of its proper divisors (2695).

656633 is a wasteful number, since it uses less digits than its factorization.

656633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694.

The product of its digits is 9720, while the sum is 29.

The square root of 656633 is about 810.3289455524. The cubic root of 656633 is about 86.9175684624.

The spelling of 656633 in words is "six hundred fifty-six thousand, six hundred thirty-three".