16266621 has 8 divisors (see below), whose sum is σ = 24787264. Its totient is φ = 9295200.

The previous prime is 16266617. The next prime is 16266631. The reversal of 16266621 is 12666261.

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

It is not a de Polignac number, because 16266621 - 2² = 16266617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16266611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387280 + ... + 387321.

It is an arithmetic number, because the mean of its divisors is an integer number (3098408).

Almost surely, 2^16266621 is an apocalyptic number.

It is an amenable number.

16266621 is a deficient number, since it is larger than the sum of its proper divisors (8520643).

16266621 is an equidigital number, since it uses as much as digits as its factorization.

16266621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774611.

The product of its digits is 5184, while the sum is 30.

The square root of 16266621 is about 4033.1899285801. The cubic root of 16266621 is about 253.3761790797.

The spelling of 16266621 in words is "sixteen million, two hundred sixty-six thousand, six hundred twenty-one".