66217327 has 4 divisors (see below), whose sum is σ = 72237096. Its totient is φ = 60197560.

The previous prime is 66217321. The next prime is 66217343. The reversal of 66217327 is 72371266.

It is a happy number.

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 66217327 - 2⁷ = 66217199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66217292 and 66217301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66217321) 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, 3009868 + ... + 3009889.

It is an arithmetic number, because the mean of its divisors is an integer number (18059274).

Almost surely, 2^66217327 is an apocalyptic number.

66217327 is a deficient number, since it is larger than the sum of its proper divisors (6019769).

66217327 is a wasteful number, since it uses less digits than its factorization.

66217327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019768.

The product of its digits is 21168, while the sum is 34.

The square root of 66217327 is about 8137.4029640912. The cubic root of 66217327 is about 404.5670870774.

The spelling of 66217327 in words is "sixty-six million, two hundred seventeen thousand, three hundred twenty-seven".