65556656 has 20 divisors (see below), whose sum is σ = 138563304. Its totient is φ = 29798400.

The previous prime is 65556613. The next prime is 65556671. The reversal of 65556656 is 65665556.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

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, 186065 + ... + 186416.

Almost surely, 2^65556656 is an apocalyptic number.

It is an amenable number.

65556656 is an abundant number, since it is smaller than the sum of its proper divisors (73006648).

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

65556656 is a wasteful number, since it uses less digits than its factorization.

65556656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372500 (or 372494 counting only the distinct ones).

The product of its digits is 810000, while the sum is 44.

The square root of 65556656 is about 8096.7064909135. The cubic root of 65556656 is about 403.2170898001.

Subtracting 65556656 from its reverse (65665556), we obtain a square (108900 = 330²).

The spelling of 65556656 in words is "sixty-five million, five hundred fifty-six thousand, six hundred fifty-six".