66783873 has 8 divisors (see below), whose sum is σ = 95894848. Its totient is φ = 41097744.

The previous prime is 66783863. The next prime is 66783877. The reversal of 66783873 is 37838766.

66783873 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.

It is not a de Polignac number, because 66783873 - 2¹² = 66779777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66783877) 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 7 ways as a sum of consecutive naturals, for example, 856165 + ... + 856242.

It is an arithmetic number, because the mean of its divisors is an integer number (11986856).

Almost surely, 2^66783873 is an apocalyptic number.

It is an amenable number.

66783873 is a deficient number, since it is larger than the sum of its proper divisors (29110975).

66783873 is a wasteful number, since it uses less digits than its factorization.

66783873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712423.

The product of its digits is 1016064, while the sum is 48.

The square root of 66783873 is about 8172.1400501949. The cubic root of 66783873 is about 405.7176181169.

The spelling of 66783873 in words is "sixty-six million, seven hundred eighty-three thousand, eight hundred seventy-three".