66583271 has 4 divisors (see below), whose sum is σ = 70499952. Its totient is φ = 62666592.

The previous prime is 66583261. The next prime is 66583289. The reversal of 66583271 is 17238566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66583271 - 2⁶ = 66583207 is a prime.

It is a super-3 number, since 3×66583271³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66583241) 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, 1958315 + ... + 1958348.

It is an arithmetic number, because the mean of its divisors is an integer number (17624988).

Almost surely, 2^66583271 is an apocalyptic number.

66583271 is a deficient number, since it is larger than the sum of its proper divisors (3916681).

66583271 is a wasteful number, since it uses less digits than its factorization.

66583271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916680.

The product of its digits is 60480, while the sum is 38.

The square root of 66583271 is about 8159.8572904187. The cubic root of 66583271 is about 405.3109860579.

The spelling of 66583271 in words is "sixty-six million, five hundred eighty-three thousand, two hundred seventy-one".