65980944 has 60 divisors (see below), whose sum is σ = 195524316. Its totient is φ = 20699136.

The previous prime is 65980921. The next prime is 65980949. The reversal of 65980944 is 44908956.

It is a happy number.

65980944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 48441600 + 17539344 = 6960^2 + 4188^2 .

It is a super-2 number, since 2×65980944² = 8706969942262272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65980944.

It is not an unprimeable number, because it can be changed into a prime (65980949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11029 + ... + 15924.

Almost surely, 2^65980944 is an apocalyptic number.

It is an amenable number.

65980944 is an abundant number, since it is smaller than the sum of its proper divisors (129543372).

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

65980944 is a wasteful number, since it uses less digits than its factorization.

65980944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26984 (or 26975 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 65980944 is about 8122.8655042417. The cubic root of 65980944 is about 404.0851044447.

The spelling of 65980944 in words is "sixty-five million, nine hundred eighty thousand, nine hundred forty-four".