66135423 has 16 divisors (see below), whose sum is σ = 94232160. Its totient is φ = 41112576.

The previous prime is 66135353. The next prime is 66135427. The reversal of 66135423 is 32453166.

It is not a de Polignac number, because 66135423 - 2¹² = 66131327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66135427) 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, 390 + ... + 11507.

It is an arithmetic number, because the mean of its divisors is an integer number (5889510).

Almost surely, 2^66135423 is an apocalyptic number.

66135423 is a deficient number, since it is larger than the sum of its proper divisors (28096737).

66135423 is a wasteful number, since it uses less digits than its factorization.

66135423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12026.

The product of its digits is 12960, while the sum is 30.

The square root of 66135423 is about 8132.3688430863. The cubic root of 66135423 is about 404.4002156789.

Adding to 66135423 its reverse (32453166), we get a palindrome (98588589).

The spelling of 66135423 in words is "sixty-six million, one hundred thirty-five thousand, four hundred twenty-three".