66434271 has 16 divisors (see below), whose sum is σ = 91653120. Its totient is φ = 42759360.

The previous prime is 66434257. The next prime is 66434293. The reversal of 66434271 is 17243466.

It is a happy number.

It is not a de Polignac number, because 66434271 - 2¹³ = 66426079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66434231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74796 + ... + 75678.

It is an arithmetic number, because the mean of its divisors is an integer number (5728320).

Almost surely, 2^66434271 is an apocalyptic number.

66434271 is a deficient number, since it is larger than the sum of its proper divisors (25218849).

66434271 is a wasteful number, since it uses less digits than its factorization.

66434271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726.

The product of its digits is 24192, while the sum is 33.

The square root of 66434271 is about 8150.7221152484. The cubic root of 66434271 is about 405.0084253696.

The spelling of 66434271 in words is "sixty-six million, four hundred thirty-four thousand, two hundred seventy-one".