66065986 has 8 divisors (see below), whose sum is σ = 113256000. Its totient is φ = 28313988.

The previous prime is 66065977. The next prime is 66066043. The reversal of 66065986 is 68956066.

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

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2359486 + ... + 2359513.

It is an arithmetic number, because the mean of its divisors is an integer number (14157000).

Almost surely, 2^66065986 is an apocalyptic number.

66065986 is a deficient number, since it is larger than the sum of its proper divisors (47190014).

66065986 is a wasteful number, since it uses less digits than its factorization.

66065986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719008.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 66065986 is about 8128.0985476309. The cubic root of 66065986 is about 404.2586366298.

The spelling of 66065986 in words is "sixty-six million, sixty-five thousand, nine hundred eighty-six".