16663698 has 16 divisors (see below), whose sum is σ = 37030560. Its totient is φ = 5554548.

The previous prime is 16663697. The next prime is 16663763. The reversal of 16663698 is 89636661.

16663698 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (16663693) 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, 154240 + ... + 154347.

It is an arithmetic number, because the mean of its divisors is an integer number (2314410).

Almost surely, 2^16663698 is an apocalyptic number.

16663698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16663698 is an abundant number, since it is smaller than the sum of its proper divisors (20366862).

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

16663698 is a wasteful number, since it uses less digits than its factorization.

16663698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308598 (or 308592 counting only the distinct ones).

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

The square root of 16663698 is about 4082.1193025192. The cubic root of 16663698 is about 255.4213104488.

The spelling of 16663698 in words is "sixteen million, six hundred sixty-three thousand, six hundred ninety-eight".