66381834 has 8 divisors (see below), whose sum is σ = 132763680. Its totient is φ = 22127276.

The previous prime is 66381827. The next prime is 66381851. The reversal of 66381834 is 43818366.

66381834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

66381834 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 66381792 and 66381801.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5531814 + ... + 5531825.

It is an arithmetic number, because the mean of its divisors is an integer number (16595460).

Almost surely, 2^66381834 is an apocalyptic number.

66381834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66381834 is a wasteful number, since it uses less digits than its factorization.

66381834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11063644.

The product of its digits is 82944, while the sum is 39.

The square root of 66381834 is about 8147.5047714009. The cubic root of 66381834 is about 404.9018387312.

The spelling of 66381834 in words is "sixty-six million, three hundred eighty-one thousand, eight hundred thirty-four".