16089661 has 8 divisors (see below), whose sum is σ = 18434304. Its totient is φ = 13756560.

The previous prime is 16089653. The next prime is 16089677. The reversal of 16089661 is 16698061.

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 16089661 - 2³ = 16089653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16089661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16089631) 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, 351 + ... + 5683.

It is an arithmetic number, because the mean of its divisors is an integer number (2304288).

Almost surely, 2^16089661 is an apocalyptic number.

It is an amenable number.

16089661 is a deficient number, since it is larger than the sum of its proper divisors (2344643).

16089661 is an equidigital number, since it uses as much as digits as its factorization.

16089661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5771.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 16089661 is about 4011.1919674830. The cubic root of 16089661 is about 252.4540242403.

Subtracting 16089661 from its reverse (16698061), we obtain a square (608400 = 780²).

The spelling of 16089661 in words is "sixteen million, eighty-nine thousand, six hundred sixty-one".