66135147 has 16 divisors (see below), whose sum is σ = 96112128. Its totient is φ = 40206240.

The previous prime is 66135137. The next prime is 66135193. The reversal of 66135147 is 74153166.

It is not a de Polignac number, because 66135147 - 2¹¹ = 66133099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66135107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6979 + ... + 13452.

It is an arithmetic number, because the mean of its divisors is an integer number (6007008).

Almost surely, 2^66135147 is an apocalyptic number.

66135147 is a deficient number, since it is larger than the sum of its proper divisors (29976981).

66135147 is a wasteful number, since it uses less digits than its factorization.

66135147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20530.

The product of its digits is 15120, while the sum is 33.

The square root of 66135147 is about 8132.3518738431. The cubic root of 66135147 is about 404.3996531230.

It can be divided in two parts, 66135 and 147, that multiplied together give a triangular number (9721845 = T₄₄₀₉).

The spelling of 66135147 in words is "sixty-six million, one hundred thirty-five thousand, one hundred forty-seven".