66828317 has 8 divisors (see below), whose sum is σ = 69964224. Its totient is φ = 63711648.

The previous prime is 66828299. The next prime is 66828323. The reversal of 66828317 is 71382866.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66828317 - 2²⁴ = 50051101 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 (66828617) 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 7 ways as a sum of consecutive naturals, for example, 2558 + ... + 11840.

It is an arithmetic number, because the mean of its divisors is an integer number (8745528).

Almost surely, 2^66828317 is an apocalyptic number.

It is an amenable number.

66828317 is a deficient number, since it is larger than the sum of its proper divisors (3135907).

66828317 is a wasteful number, since it uses less digits than its factorization.

66828317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9619.

The product of its digits is 96768, while the sum is 41.

The square root of 66828317 is about 8174.8588367017. The cubic root of 66828317 is about 405.8075984995.

The spelling of 66828317 in words is "sixty-six million, eight hundred twenty-eight thousand, three hundred seventeen".