66496171 has 4 divisors (see below), whose sum is σ = 75995632. Its totient is φ = 56996712.

The previous prime is 66496169. The next prime is 66496187. The reversal of 66496171 is 17169466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17169466 = 2 ⋅8584733.

It is a cyclic number.

It is not a de Polignac number, because 66496171 - 2¹ = 66496169 is a prime.

It is a super-2 number, since 2×66496171² = 8843481515322482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66496471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4749720 + ... + 4749733.

It is an arithmetic number, because the mean of its divisors is an integer number (18998908).

Almost surely, 2^66496171 is an apocalyptic number.

66496171 is a deficient number, since it is larger than the sum of its proper divisors (9499461).

66496171 is an equidigital number, since it uses as much as digits as its factorization.

66496171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9499460.

The product of its digits is 54432, while the sum is 40.

The square root of 66496171 is about 8154.5184407174. The cubic root of 66496171 is about 405.1341749206.

The spelling of 66496171 in words is "sixty-six million, four hundred ninety-six thousand, one hundred seventy-one".