66271071 has 8 divisors (see below), whose sum is σ = 89810224. Its totient is φ = 43456320.

The previous prime is 66271057. The next prime is 66271099. The reversal of 66271071 is 17017266.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66271071 - 2⁵ = 66271039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66275071) 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 7 ways as a sum of consecutive naturals, for example, 180886 + ... + 181251.

It is an arithmetic number, because the mean of its divisors is an integer number (11226278).

Almost surely, 2^66271071 is an apocalyptic number.

66271071 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

66271071 is a deficient number, since it is larger than the sum of its proper divisors (23539153).

66271071 is a wasteful number, since it uses less digits than its factorization.

66271071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362201.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 66271071 is about 8140.7045763865. The cubic root of 66271071 is about 404.6765104701.

The spelling of 66271071 in words is "sixty-six million, two hundred seventy-one thousand, seventy-one".