65644422 has 32 divisors (see below), whose sum is σ = 138101760. Its totient is φ = 20772960.

The previous prime is 65644417. The next prime is 65644427. The reversal of 65644422 is 22444656.

It is an interprime number because it is at equal distance from previous prime (65644417) and next prime (65644427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65644427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6529 + ... + 13187.

It is an arithmetic number, because the mean of its divisors is an integer number (4315680).

Almost surely, 2^65644422 is an apocalyptic number.

65644422 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

65644422 is an abundant number, since it is smaller than the sum of its proper divisors (72457338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65644422 is a wasteful number, since it uses less digits than its factorization.

65644422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6748.

The product of its digits is 46080, while the sum is 33.

The square root of 65644422 is about 8102.1245361942. The cubic root of 65644422 is about 403.3969493415.

It can be divided in two parts, 65644 and 422, that added together give a palindrome (66066).

The spelling of 65644422 in words is "sixty-five million, six hundred forty-four thousand, four hundred twenty-two".