65561208 has 32 divisors (see below), whose sum is σ = 164918400. Its totient is φ = 21718368.

The previous prime is 65561207. The next prime is 65561219. The reversal of 65561208 is 80216556.

65561208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65561207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4468 + ... + 12291.

It is an arithmetic number, because the mean of its divisors is an integer number (5153700).

Almost surely, 2^65561208 is an apocalyptic number.

It is an amenable number.

65561208 is an abundant number, since it is smaller than the sum of its proper divisors (99357192).

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

65561208 is a wasteful number, since it uses less digits than its factorization.

65561208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16931 (or 16927 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 65561208 is about 8096.9875879860. The cubic root of 65561208 is about 403.2264221945.

The spelling of 65561208 in words is "sixty-five million, five hundred sixty-one thousand, two hundred eight".