16661459 has 4 divisors (see below), whose sum is σ = 16672104. Its totient is φ = 16650816.

The previous prime is 16661443. The next prime is 16661467. The reversal of 16661459 is 95416661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16661459 - 2⁴ = 16661443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16661419) 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 3 ways as a sum of consecutive naturals, for example, 2462 + ... + 6275.

It is an arithmetic number, because the mean of its divisors is an integer number (4168026).

Almost surely, 2^16661459 is an apocalyptic number.

16661459 is a deficient number, since it is larger than the sum of its proper divisors (10645).

16661459 is an equidigital number, since it uses as much as digits as its factorization.

16661459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10644.

The product of its digits is 38880, while the sum is 38.

The square root of 16661459 is about 4081.8450485044. The cubic root of 16661459 is about 255.4098701325.

It can be divided in two parts, 1666 and 1459, that added together give a 5-th power (3125 = 5⁵).

The spelling of 16661459 in words is "sixteen million, six hundred sixty-one thousand, four hundred fifty-nine".