66066289 has 8 divisors (see below), whose sum is σ = 66771968. Its totient is φ = 65363760.

The previous prime is 66066229. The next prime is 66066311. The reversal of 66066289 is 98266066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66066289 - 2¹¹ = 66064241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66066229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83554 + ... + 84340.

It is an arithmetic number, because the mean of its divisors is an integer number (8346496).

Almost surely, 2^66066289 is an apocalyptic number.

It is an amenable number.

66066289 is a deficient number, since it is larger than the sum of its proper divisors (705679).

66066289 is a wasteful number, since it uses less digits than its factorization.

66066289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 66066289 is about 8128.1171866552. The cubic root of 66066289 is about 404.2592546492.

The spelling of 66066289 in words is "sixty-six million, sixty-six thousand, two hundred eighty-nine".