16661122 has 8 divisors (see below), whose sum is σ = 26461836. Its totient is φ = 7840512.

The previous prime is 16661107. The next prime is 16661123. The reversal of 16661122 is 22116661.

It can be written as a sum of positive squares in 2 ways, for example, as 16654561 + 6561 = 4081^2 + 81^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16661123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244983 + ... + 245050.

Almost surely, 2^16661122 is an apocalyptic number.

16661122 is a deficient number, since it is larger than the sum of its proper divisors (9800714).

16661122 is a wasteful number, since it uses less digits than its factorization.

16661122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490052.

The product of its digits is 864, while the sum is 25.

The square root of 16661122 is about 4081.8037679438. The cubic root of 16661122 is about 255.4081481203.

Adding to 16661122 its reverse (22116661), we get a palindrome (38777783).

The spelling of 16661122 in words is "sixteen million, six hundred sixty-one thousand, one hundred twenty-two".