65564601 has 4 divisors (see below), whose sum is σ = 87419472. Its totient is φ = 43709732.

The previous prime is 65564599. The next prime is 65564623. The reversal of 65564601 is 10646556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65564601 - 2¹ = 65564599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65569601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10927431 + ... + 10927436.

It is an arithmetic number, because the mean of its divisors is an integer number (21854868).

Almost surely, 2^65564601 is an apocalyptic number.

It is an amenable number.

65564601 is a deficient number, since it is larger than the sum of its proper divisors (21854871).

65564601 is a wasteful number, since it uses less digits than its factorization.

65564601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21854870.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 65564601 is about 8097.1971076416. The cubic root of 65564601 is about 403.2333781557.

It can be divided in two parts, 655 and 64601, that added together give a palindrome (65256).

The spelling of 65564601 in words is "sixty-five million, five hundred sixty-four thousand, six hundred one".