66041985 has 8 divisors (see below), whose sum is σ = 105667200. Its totient is φ = 35222384.

The previous prime is 66041977. The next prime is 66042001. The reversal of 66041985 is 58914066.

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 66041985 - 2³ = 66041977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2201385 + ... + 2201414.

It is an arithmetic number, because the mean of its divisors is an integer number (13208400).

Almost surely, 2^66041985 is an apocalyptic number.

It is an amenable number.

66041985 is a deficient number, since it is larger than the sum of its proper divisors (39625215).

66041985 is a wasteful number, since it uses less digits than its factorization.

66041985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4402807.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 66041985 is about 8126.6219919472. The cubic root of 66041985 is about 404.2096765556.

The spelling of 66041985 in words is "sixty-six million, forty-one thousand, nine hundred eighty-five".