65806223 has 4 divisors (see below), whose sum is σ = 75207120. Its totient is φ = 56405328.

The previous prime is 65806219. The next prime is 65806267. The reversal of 65806223 is 32260856.

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

It is not a de Polignac number, because 65806223 - 2² = 65806219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65806223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65806723) 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, 4700438 + ... + 4700451.

It is an arithmetic number, because the mean of its divisors is an integer number (18801780).

Almost surely, 2^65806223 is an apocalyptic number.

65806223 is a deficient number, since it is larger than the sum of its proper divisors (9400897).

65806223 is an equidigital number, since it uses as much as digits as its factorization.

65806223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9400896.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 65806223 is about 8112.1034879987. The cubic root of 65806223 is about 403.7281096293.

The spelling of 65806223 in words is "sixty-five million, eight hundred six thousand, two hundred twenty-three".