65561075 has 6 divisors (see below), whose sum is σ = 81295764. Its totient is φ = 52448840.

The previous prime is 65561071. The next prime is 65561087. The reversal of 65561075 is 57016556.

It is not a de Polignac number, because 65561075 - 2² = 65561071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65561071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1311197 + ... + 1311246.

It is an arithmetic number, because the mean of its divisors is an integer number (13549294).

Almost surely, 2^65561075 is an apocalyptic number.

65561075 is a deficient number, since it is larger than the sum of its proper divisors (15734689).

65561075 is a wasteful number, since it uses less digits than its factorization.

65561075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622453 (or 2622448 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 65561075 is about 8096.9793750509. The cubic root of 65561075 is about 403.2261495275.

The spelling of 65561075 in words is "sixty-five million, five hundred sixty-one thousand, seventy-five".