66065704 has 8 divisors (see below), whose sum is σ = 123873210. Its totient is φ = 33032848.

The previous prime is 66065687. The next prime is 66065707. The reversal of 66065704 is 40756066.

It can be written as a sum of positive squares in only one way, i.e., 43956900 + 22108804 = 6630^2 + 4702^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 66065704.

It is not an unprimeable number, because it can be changed into a prime (66065707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4129099 + ... + 4129114.

Almost surely, 2^66065704 is an apocalyptic number.

It is an amenable number.

66065704 is a deficient number, since it is larger than the sum of its proper divisors (57807506).

66065704 is a wasteful number, since it uses less digits than its factorization.

66065704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8258219 (or 8258215 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 66065704 is about 8128.0812003818. The cubic root of 66065704 is about 404.2580614417.

The spelling of 66065704 in words is "sixty-six million, sixty-five thousand, seven hundred four".