66783384 has 48 divisors (see below), whose sum is σ = 182200200. Its totient is φ = 22097664.

The previous prime is 66783373. The next prime is 66783397. The reversal of 66783384 is 48338766.

66783384 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 6672 + ... + 13344.

Almost surely, 2^66783384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66783384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91100100).

66783384 is an abundant number, since it is smaller than the sum of its proper divisors (115416816).

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

66783384 is a wasteful number, since it uses less digits than its factorization.

66783384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6824 (or 6817 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 66783384 is about 8172.1101314165. The cubic root of 66783384 is about 405.7166278759.

The spelling of 66783384 in words is "sixty-six million, seven hundred eighty-three thousand, three hundred eighty-four".