16655381 has 8 divisors (see below), whose sum is σ = 18294720. Its totient is φ = 15092352.

The previous prime is 16655363. The next prime is 16655383. The reversal of 16655381 is 18355661.

16655381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16655381 is a prime.

It is a super-2 number, since 2×16655381² = 554803432510322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16655383) 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, 18620 + ... + 19493.

It is an arithmetic number, because the mean of its divisors is an integer number (2286840).

Almost surely, 2^16655381 is an apocalyptic number.

It is an amenable number.

16655381 is a deficient number, since it is larger than the sum of its proper divisors (1639339).

16655381 is a wasteful number, since it uses less digits than its factorization.

16655381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38155.

The product of its digits is 21600, while the sum is 35.

The square root of 16655381 is about 4081.1004643356. The cubic root of 16655381 is about 255.3788090272.

The spelling of 16655381 in words is "sixteen million, six hundred fifty-five thousand, three hundred eighty-one".