66065806 has 8 divisors (see below), whose sum is σ = 100723464. Its totient is φ = 32491320.

The previous prime is 66065773. The next prime is 66065833. The reversal of 66065806 is 60856066.

66065806 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 congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 270640 + ... + 270883.

It is an arithmetic number, because the mean of its divisors is an integer number (12590433).

Almost surely, 2^66065806 is an apocalyptic number.

66065806 is a deficient number, since it is larger than the sum of its proper divisors (34657658).

66065806 is a wasteful number, since it uses less digits than its factorization.

66065806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541586.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 66065806 is about 8128.0874749230. The cubic root of 66065806 is about 404.2582694887.

It can be divided in two parts, 660 and 65806, that added together give a palindrome (66466).

The spelling of 66065806 in words is "sixty-six million, sixty-five thousand, eight hundred six".