66135814 has 16 divisors (see below), whose sum is σ = 106822800. Its totient is φ = 30594304.

The previous prime is 66135809. The next prime is 66135869. The reversal of 66135814 is 41853166.

It is a happy number.

66135814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 66135814.

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 7 ways as a sum of consecutive naturals, for example, 14479 + ... + 18490.

It is an arithmetic number, because the mean of its divisors is an integer number (6676425).

Almost surely, 2^66135814 is an apocalyptic number.

66135814 is a deficient number, since it is larger than the sum of its proper divisors (40686986).

66135814 is a wasteful number, since it uses less digits than its factorization.

66135814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33047.

The product of its digits is 17280, while the sum is 34.

The square root of 66135814 is about 8132.3928827867. The cubic root of 66135814 is about 404.4010126303.

The spelling of 66135814 in words is "sixty-six million, one hundred thirty-five thousand, eight hundred fourteen".