16667221567 has 12 divisors (see below), whose sum is σ = 16938040896. Its totient is φ = 16400667360.

The previous prime is 16667221547. The next prime is 16667221603. The reversal of 16667221567 is 76512276661.

It is not a de Polignac number, because 16667221567 - 2¹¹ = 16667219519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16667221567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16667221507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6431442 + ... + 6434032.

It is an arithmetic number, because the mean of its divisors is an integer number (1411503408).

Almost surely, 2^16667221567 is an apocalyptic number.

16667221567 is a deficient number, since it is larger than the sum of its proper divisors (270819329).

16667221567 is an equidigital number, since it uses as much as digits as its factorization.

16667221567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158 (or 4091 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The spelling of 16667221567 in words is "sixteen billion, six hundred sixty-seven million, two hundred twenty-one thousand, five hundred sixty-seven".