65561072 has 10 divisors (see below), whose sum is σ = 127024608. Its totient is φ = 32780528.

The previous prime is 65561071. The next prime is 65561087. The reversal of 65561072 is 27016556.

It is a happy number.

65561072 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 (65561071) 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 as a sum of consecutive naturals, namely, 2048768 + ... + 2048799.

Almost surely, 2^65561072 is an apocalyptic number.

It is an amenable number.

65561072 is a deficient number, since it is larger than the sum of its proper divisors (61463536).

65561072 is a wasteful number, since it uses less digits than its factorization.

65561072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097575 (or 4097569 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 65561072 is about 8096.9791897966. The cubic root of 65561072 is about 403.2261433771.

The spelling of 65561072 in words is "sixty-five million, five hundred sixty-one thousand, seventy-two".