66495171 has 16 divisors (see below), whose sum is σ = 89631360. Its totient is φ = 43848000.

The previous prime is 66495167. The next prime is 66495181. The reversal of 66495171 is 17159466.

It is not a de Polignac number, because 66495171 - 2² = 66495167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66495131) 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, 175260 + ... + 175638.

It is an arithmetic number, because the mean of its divisors is an integer number (5601960).

Almost surely, 2^66495171 is an apocalyptic number.

66495171 is a deficient number, since it is larger than the sum of its proper divisors (23136189).

66495171 is a wasteful number, since it uses less digits than its factorization.

66495171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its digits is 45360, while the sum is 39.

The square root of 66495171 is about 8154.4571247876. The cubic root of 66495171 is about 405.1321440457.

It can be divided in two parts, 66495 and 171, that added together give a palindrome (66666).

The spelling of 66495171 in words is "sixty-six million, four hundred ninety-five thousand, one hundred seventy-one".