66585830 has 32 divisors (see below), whose sum is σ = 124277760. Its totient is φ = 25659360.

The previous prime is 66585809. The next prime is 66585833. The reversal of 66585830 is 3858566.

66585830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66585833) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 107261 + ... + 107879.

It is an arithmetic number, because the mean of its divisors is an integer number (3883680).

Almost surely, 2^66585830 is an apocalyptic number.

66585830 is a deficient number, since it is larger than the sum of its proper divisors (57691930).

66585830 is a wasteful number, since it uses less digits than its factorization.

66585830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 66585830 is about 8160.0140931251. The cubic root of 66585830 is about 405.3161784409.

The spelling of 66585830 in words is "sixty-six million, five hundred eighty-five thousand, eight hundred thirty".