16661226 has 8 divisors (see below), whose sum is σ = 33322464. Its totient is φ = 5553740.

The previous prime is 16661221. The next prime is 16661237. The reversal of 16661226 is 62216661.

It is a sphenic number, since it is the product of 3 distinct primes.

16661226 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16661193 and 16661202.

It is not an unprimeable number, because it can be changed into a prime (16661221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388430 + ... + 1388441.

It is an arithmetic number, because the mean of its divisors is an integer number (4165308).

Almost surely, 2^16661226 is an apocalyptic number.

16661226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16661226 is a wasteful number, since it uses less digits than its factorization.

16661226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776876.

The product of its digits is 5184, while the sum is 30.

The square root of 16661226 is about 4081.8165073898. The cubic root of 16661226 is about 255.4086795449.

Adding to 16661226 its reverse (62216661), we get a palindrome (78877887).

The spelling of 16661226 in words is "sixteen million, six hundred sixty-one thousand, two hundred twenty-six".