65561612 has 6 divisors (see below), whose sum is σ = 114732828. Its totient is φ = 32780804.

The previous prime is 65561611. The next prime is 65561651. The reversal of 65561612 is 21616556.

It is not an unprimeable number, because it can be changed into a prime (65561611) 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 as a sum of consecutive naturals, namely, 8195198 + ... + 8195205.

It is an arithmetic number, because the mean of its divisors is an integer number (19122138).

Almost surely, 2^65561612 is an apocalyptic number.

It is an amenable number.

65561612 is a deficient number, since it is larger than the sum of its proper divisors (49171216).

65561612 is a wasteful number, since it uses less digits than its factorization.

65561612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16390407 (or 16390405 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 65561612 is about 8097.0125354973. The cubic root of 65561612 is about 403.2272504442.

The spelling of 65561612 in words is "sixty-five million, five hundred sixty-one thousand, six hundred twelve".