2016667221 has 8 divisors (see below), whose sum is σ = 2781610080. Its totient is φ = 1298084592.

The previous prime is 2016667193. The next prime is 2016667223. The reversal of 2016667221 is 1227666102.

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

It is not a de Polignac number, because 2016667221 - 2⁵ = 2016667189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016667223) 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, 11589955 + ... + 11590128.

It is an arithmetic number, because the mean of its divisors is an integer number (347701260).

Almost surely, 2^2016667221 is an apocalyptic number.

It is an amenable number.

2016667221 is a deficient number, since it is larger than the sum of its proper divisors (764942859).

2016667221 is a wasteful number, since it uses less digits than its factorization.

2016667221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23180115.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 2016667221 is about 44907.3181229964. The cubic root of 2016667221 is about 1263.4112694954.

The spelling of 2016667221 in words is "two billion, sixteen million, six hundred sixty-seven thousand, two hundred twenty-one".