65563656 has 16 divisors (see below), whose sum is σ = 163909200. Its totient is φ = 21854544.

The previous prime is 65563649. The next prime is 65563657. The reversal of 65563656 is 65636556.

It is not an unprimeable number, because it can be changed into a prime (65563657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1365886 + ... + 1365933.

It is an arithmetic number, because the mean of its divisors is an integer number (10244325).

Almost surely, 2^65563656 is an apocalyptic number.

It is an amenable number.

65563656 is an abundant number, since it is smaller than the sum of its proper divisors (98345544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65563656 is a wasteful number, since it uses less digits than its factorization.

65563656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731828 (or 2731824 counting only the distinct ones).

The product of its digits is 486000, while the sum is 42.

The square root of 65563656 is about 8097.1387539056. The cubic root of 65563656 is about 403.2314408431.

Subtracting 65563656 from its reverse (65636556), we obtain a square (72900 = 270²).

The spelling of 65563656 in words is "sixty-five million, five hundred sixty-three thousand, six hundred fifty-six".