65981244 has 36 divisors (see below), whose sum is σ = 179093544. Its totient is φ = 18851616.

The previous prime is 65981207. The next prime is 65981257. The reversal of 65981244 is 44218956.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 55519 + ... + 56694.

Almost surely, 2^65981244 is an apocalyptic number.

It is an amenable number.

65981244 is an abundant number, since it is smaller than the sum of its proper divisors (113112300).

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

65981244 is a wasteful number, since it uses less digits than its factorization.

65981244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112234 (or 112225 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 65981244 is about 8122.8839706104. The cubic root of 65981244 is about 404.0857168708.

The spelling of 65981244 in words is "sixty-five million, nine hundred eighty-one thousand, two hundred forty-four".