656606 has 4 divisors (see below), whose sum is σ = 984912. Its totient is φ = 328302.

The previous prime is 656603. The next prime is 656609. The reversal of 656606 is 606656.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (656603) and next prime (656609).

It is a super-2 number, since 2×656606² = 862262878472, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 164150 + ... + 164153.

It is an arithmetic number, because the mean of its divisors is an integer number (246228).

2⁶⁵⁶⁶⁰⁶ is an apocalyptic number.

656606 is a deficient number, since it is larger than the sum of its proper divisors (328306).

656606 is a wasteful number, since it uses less digits than its factorization.

656606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328305.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 656606 is about 810.3122854801. The cubic root of 656606 is about 86.9163771290.

The spelling of 656606 in words is "six hundred fifty-six thousand, six hundred six".