16645698 has 48 divisors (see below), whose sum is σ = 38877696. Its totient is φ = 5132160.

The previous prime is 16645693. The next prime is 16645711. The reversal of 16645698 is 89654661.

It is not an unprimeable number, because it can be changed into a prime (16645693) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12186 + ... + 13482.

It is an arithmetic number, because the mean of its divisors is an integer number (809952).

Almost surely, 2^16645698 is an apocalyptic number.

16645698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16645698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19438848).

16645698 is an abundant number, since it is smaller than the sum of its proper divisors (22231998).

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

16645698 is a wasteful number, since it uses less digits than its factorization.

16645698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359 (or 1356 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 16645698 is about 4079.9139696812. The cubic root of 16645698 is about 255.3293092614.

The spelling of 16645698 in words is "sixteen million, six hundred forty-five thousand, six hundred ninety-eight".