656613 has 16 divisors (see below), whose sum is σ = 987840. Its totient is φ = 430992.

The previous prime is 656609. The next prime is 656651. The reversal of 656613 is 316656.

656613 is a `hidden beast` number, since 656 + 6 + 1 + 3 = 666.

656613 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 656613 - 2² = 656609 is a prime.

It is a super-2 number, since 2×656613² = 862281263538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

656613 is strictly pandigital in base 7.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2095 + ... + 2387.

It is an arithmetic number, because the mean of its divisors is an integer number (61740).

2⁶⁵⁶⁶¹³ is an apocalyptic number.

It is an amenable number.

656613 is a deficient number, since it is larger than the sum of its proper divisors (331227).

656613 is a wasteful number, since it uses less digits than its factorization.

656613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 379 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 656613 is about 810.3166047910. The cubic root of 656613 is about 86.9166859963.

It can be divided in two parts, 6566 and 13, that multiplied together give a palindrome (85358).

The spelling of 656613 in words is "six hundred fifty-six thousand, six hundred thirteen".