66005886 has 16 divisors (see below), whose sum is σ = 138960000. Its totient is φ = 20843928.

The previous prime is 66005873. The next prime is 66005911. The reversal of 66005886 is 68850066.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289386 + ... + 289613.

It is an arithmetic number, because the mean of its divisors is an integer number (8685000).

Almost surely, 2^66005886 is an apocalyptic number.

66005886 is an abundant number, since it is smaller than the sum of its proper divisors (72954114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66005886 is a wasteful number, since it uses less digits than its factorization.

66005886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579023.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 66005886 is about 8124.4006548176. The cubic root of 66005886 is about 404.1360152095.

The spelling of 66005886 in words is "sixty-six million, five thousand, eight hundred eighty-six".