16940663 has 8 divisors (see below), whose sum is σ = 17558016. Its totient is φ = 16327800.

The previous prime is 16940639. The next prime is 16940689. The reversal of 16940663 is 36604961.

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 16940663 - 2¹⁶ = 16875127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16940603) 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, 7808 + ... + 9738.

It is an arithmetic number, because the mean of its divisors is an integer number (2194752).

Almost surely, 2^16940663 is an apocalyptic number.

16940663 is a deficient number, since it is larger than the sum of its proper divisors (617353).

16940663 is a wasteful number, since it uses less digits than its factorization.

16940663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 16940663 is about 4115.9036674830. The cubic root of 16940663 is about 256.8286492737.

The spelling of 16940663 in words is "sixteen million, nine hundred forty thousand, six hundred sixty-three".