66378135 has 16 divisors (see below), whose sum is σ = 106323840. Its totient is φ = 35362080.

The previous prime is 66378133. The next prime is 66378157. The reversal of 66378135 is 53187366.

It is not a de Polignac number, because 66378135 - 2¹ = 66378133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66378093 and 66378102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66378133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15676 + ... + 19454.

It is an arithmetic number, because the mean of its divisors is an integer number (6645240).

Almost surely, 2^66378135 is an apocalyptic number.

66378135 is a deficient number, since it is larger than the sum of its proper divisors (39945705).

66378135 is a wasteful number, since it uses less digits than its factorization.

66378135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958.

The product of its digits is 90720, while the sum is 39.

The square root of 66378135 is about 8147.2777662235. The cubic root of 66378135 is about 404.8943177995.

The spelling of 66378135 in words is "sixty-six million, three hundred seventy-eight thousand, one hundred thirty-five".