16698663 has 32 divisors (see below), whose sum is σ = 26681600. Its totient is φ = 10287648.

The previous prime is 16698653. The next prime is 16698679. The reversal of 16698663 is 36689661.

It is not a de Polignac number, because 16698663 - 2⁵ = 16698631 is a prime.

It is a super-3 number, since 3×16698663³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16698613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21681 + ... + 22437.

It is an arithmetic number, because the mean of its divisors is an integer number (833800).

Almost surely, 2^16698663 is an apocalyptic number.

16698663 is a deficient number, since it is larger than the sum of its proper divisors (9982937).

16698663 is a wasteful number, since it uses less digits than its factorization.

16698663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 822 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 16698663 is about 4086.3997601801. The cubic root of 16698663 is about 255.5998335867.

The spelling of 16698663 in words is "sixteen million, six hundred ninety-eight thousand, six hundred sixty-three".