66135273 has 4 divisors (see below), whose sum is σ = 88180368. Its totient is φ = 44090180.

The previous prime is 66135259. The next prime is 66135323. The reversal of 66135273 is 37253166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66135273 - 2⁵ = 66135241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66135203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11022543 + ... + 11022548.

It is an arithmetic number, because the mean of its divisors is an integer number (22045092).

Almost surely, 2^66135273 is an apocalyptic number.

It is an amenable number.

66135273 is a deficient number, since it is larger than the sum of its proper divisors (22045095).

66135273 is a wasteful number, since it uses less digits than its factorization.

66135273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22045094.

The product of its digits is 22680, while the sum is 33.

The square root of 66135273 is about 8132.3596206759. The cubic root of 66135273 is about 404.3999099421.

The spelling of 66135273 in words is "sixty-six million, one hundred thirty-five thousand, two hundred seventy-three".