65656 has 16 divisors (see below), whose sum is σ = 127800. Its totient is φ = 31584.

The previous prime is 65651. The next prime is 65657.

65656 is nontrivially palindromic in base 7 and base 10.

65656 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between even and odd.

65656 is an undulating number in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91 + ... + 373.

2⁶⁵⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

65656 is a deficient number, since it is larger than the sum of its proper divisors (62144).

65656 is a wasteful number, since it uses less digits than its factorization.

65656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 314 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 65656 is about 256.2342678098. The cubic root of 65656 is about 40.3420664255.

The spelling of 65656 in words is "sixty-five thousand, six hundred fifty-six".