65564879 has 4 divisors (see below), whose sum is σ = 66488400. Its totient is φ = 64641360.

The previous prime is 65564867. The next prime is 65564909. The reversal of 65564879 is 97846556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65564879 - 2⁸ = 65564623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65564179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461654 + ... + 461795.

It is an arithmetic number, because the mean of its divisors is an integer number (16622100).

Almost surely, 2^65564879 is an apocalyptic number.

65564879 is a deficient number, since it is larger than the sum of its proper divisors (923521).

65564879 is an equidigital number, since it uses as much as digits as its factorization.

65564879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923520.

The product of its digits is 1814400, while the sum is 50.

The square root of 65564879 is about 8097.2142740575. The cubic root of 65564879 is about 403.2339480706.

The spelling of 65564879 in words is "sixty-five million, five hundred sixty-four thousand, eight hundred seventy-nine".