64066709 has 8 divisors (see below), whose sum is σ = 74146560. Its totient is φ = 54218736.

The previous prime is 64066703. The next prime is 64066741. The reversal of 64066709 is 90766046.

64066709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64066709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64066703) 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 7 ways as a sum of consecutive naturals, for example, 57374 + ... + 58479.

It is an arithmetic number, because the mean of its divisors is an integer number (9268320).

Almost surely, 2^64066709 is an apocalyptic number.

It is an amenable number.

64066709 is a deficient number, since it is larger than the sum of its proper divisors (10079851).

64066709 is a wasteful number, since it uses less digits than its factorization.

64066709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115939.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 64066709 is about 8004.1682266179. The cubic root of 64066709 is about 400.1389288247.

The spelling of 64066709 in words is "sixty-four million, sixty-six thousand, seven hundred nine".