16966381 has 8 divisors (see below), whose sum is σ = 17446880. Its totient is φ = 16489872.

The previous prime is 16966379. The next prime is 16966399. The reversal of 16966381 is 18366961.

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 16966381 - 2¹ = 16966379 is a prime.

It is a super-2 number, since 2×16966381² = 575716168474322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16966321) 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, 8986 + ... + 10708.

It is an arithmetic number, because the mean of its divisors is an integer number (2180860).

Almost surely, 2^16966381 is an apocalyptic number.

It is an amenable number.

16966381 is a deficient number, since it is larger than the sum of its proper divisors (480499).

16966381 is a wasteful number, since it uses less digits than its factorization.

16966381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995.

The product of its digits is 46656, while the sum is 40.

The square root of 16966381 is about 4119.0267054245. The cubic root of 16966381 is about 256.9585493365.

It can be divided in two parts, 169663 and 81, that added together give a square (169744 = 412²).

The spelling of 16966381 in words is "sixteen million, nine hundred sixty-six thousand, three hundred eighty-one".