16665320271 has 8 divisors (see below), whose sum is σ = 22440431664. Its totient is φ = 11000211200.

The previous prime is 16665320249. The next prime is 16665320297. The reversal of 16665320271 is 17202356661.

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 16665320271 - 2⁵ = 16665320239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665320171) 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, 27500226 + ... + 27500831.

It is an arithmetic number, because the mean of its divisors is an integer number (2805053958).

Almost surely, 2^16665320271 is an apocalyptic number.

16665320271 is a deficient number, since it is larger than the sum of its proper divisors (5775111393).

16665320271 is a wasteful number, since it uses less digits than its factorization.

16665320271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55001161.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 16665320271 in words is "sixteen billion, six hundred sixty-five million, three hundred twenty thousand, two hundred seventy-one".