65664044 has 12 divisors (see below), whose sum is σ = 115458168. Its totient is φ = 32676000.

The previous prime is 65664043. The next prime is 65664059. The reversal of 65664044 is 44046656.

It is a junction number, because it is equal to n+sod(n) for n = 65663995 and 65664013.

It is not an unprimeable number, because it can be changed into a prime (65664041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38057 + ... + 39744.

It is an arithmetic number, because the mean of its divisors is an integer number (9621514).

Almost surely, 2^65664044 is an apocalyptic number.

It is an amenable number.

65664044 is a deficient number, since it is larger than the sum of its proper divisors (49794124).

65664044 is a wasteful number, since it uses less digits than its factorization.

65664044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78016 (or 78014 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 65664044 is about 8103.3353626763. The cubic root of 65664044 is about 403.4371389273.

The spelling of 65664044 in words is "sixty-five million, six hundred sixty-four thousand, forty-four".