16622641 has 8 divisors (see below), whose sum is σ = 19039104. Its totient is φ = 14216640.

The previous prime is 16622623. The next prime is 16622647. The reversal of 16622641 is 14622661.

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 16622641 - 2⁷ = 16622513 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16622647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1161 + ... + 5881.

It is an arithmetic number, because the mean of its divisors is an integer number (2379888).

Almost surely, 2^16622641 is an apocalyptic number.

It is an amenable number.

16622641 is a deficient number, since it is larger than the sum of its proper divisors (2416463).

16622641 is an equidigital number, since it uses as much as digits as its factorization.

16622641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231.

The product of its digits is 3456, while the sum is 28.

The square root of 16622641 is about 4077.0873181721. The cubic root of 16622641 is about 255.2113639083.

The spelling of 16622641 in words is "sixteen million, six hundred twenty-two thousand, six hundred forty-one".