16726668 has 48 divisors (see below), whose sum is σ = 45045504. Its totient is φ = 4731840.

The previous prime is 16726667. The next prime is 16726687. The reversal of 16726668 is 86662761.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (16726663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8058 + ... + 9918.

It is an arithmetic number, because the mean of its divisors is an integer number (938448).

Almost surely, 2^16726668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16726668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22522752).

16726668 is an abundant number, since it is smaller than the sum of its proper divisors (28318836).

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

16726668 is a wasteful number, since it uses less digits than its factorization.

16726668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982 (or 1980 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 16726668 is about 4089.8249351286. The cubic root of 16726668 is about 255.7426409382.

The spelling of 16726668 in words is "sixteen million, seven hundred twenty-six thousand, six hundred sixty-eight".