66556350329 has 8 divisors (see below), whose sum is σ = 76919057280. Its totient is φ = 56407307616.

The previous prime is 66556350319. The next prime is 66556350347. The reversal of 66556350329 is 92305365566.

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 66556350329 - 2¹⁶ = 66556284793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66556350319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53415389 + ... + 53416634.

It is an arithmetic number, because the mean of its divisors is an integer number (9614882160).

Almost surely, 2^66556350329 is an apocalyptic number.

It is an amenable number.

66556350329 is a deficient number, since it is larger than the sum of its proper divisors (10362706951).

66556350329 is a wasteful number, since it uses less digits than its factorization.

66556350329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106832119.

The product of its (nonzero) digits is 4374000, while the sum is 50.

The spelling of 66556350329 in words is "sixty-six billion, five hundred fifty-six million, three hundred fifty thousand, three hundred twenty-nine".