65644222 has 12 divisors (see below), whose sum is σ = 114542640. Its totient is φ = 28133196.

The previous prime is 65644211. The next prime is 65644223. The reversal of 65644222 is 22244656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65644223) 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 5 ways as a sum of consecutive naturals, for example, 334822 + ... + 335017.

It is an arithmetic number, because the mean of its divisors is an integer number (9545220).

Almost surely, 2^65644222 is an apocalyptic number.

65644222 is a deficient number, since it is larger than the sum of its proper divisors (48898418).

65644222 is a wasteful number, since it uses less digits than its factorization.

65644222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669855 (or 669848 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 65644222 is about 8102.1121937431. The cubic root of 65644222 is about 403.3965396622.

Adding to 65644222 its reverse (22244656), we get a palindrome (87888878).

The spelling of 65644222 in words is "sixty-five million, six hundred forty-four thousand, two hundred twenty-two".