16661456 has 20 divisors (see below), whose sum is σ = 36893472. Its totient is φ = 7140576.

The previous prime is 16661443. The next prime is 16661467. The reversal of 16661456 is 65416661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74270 + ... + 74493.

Almost surely, 2^16661456 is an apocalyptic number.

16661456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16661456 is an abundant number, since it is smaller than the sum of its proper divisors (20232016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16661456 is a wasteful number, since it uses less digits than its factorization.

16661456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148778 (or 148772 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 16661456 is about 4081.8446810235. The cubic root of 16661456 is about 255.4098548031.

The spelling of 16661456 in words is "sixteen million, six hundred sixty-one thousand, four hundred fifty-six".