656677 has 4 divisors (see below), whose sum is σ = 750496. Its totient is φ = 562860.

The previous prime is 656671. The next prime is 656681. The reversal of 656677 is 776656.

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 656677 - 2¹¹ = 654629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656671) 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 3 ways as a sum of consecutive naturals, for example, 46899 + ... + 46912.

It is an arithmetic number, because the mean of its divisors is an integer number (187624).

2⁶⁵⁶⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

656677 is a deficient number, since it is larger than the sum of its proper divisors (93819).

656677 is an equidigital number, since it uses as much as digits as its factorization.

656677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93818.

The product of its digits is 52920, while the sum is 37.

The square root of 656677 is about 810.3560945658. The cubic root of 656677 is about 86.9195098247.

The spelling of 656677 in words is "six hundred fifty-six thousand, six hundred seventy-seven".