16661266 has 8 divisors (see below), whose sum is σ = 25058304. Its totient is φ = 8308500.

The previous prime is 16661261. The next prime is 16661287. The reversal of 16661266 is 66216661.

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 (16661261) 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, 10110 + ... + 11641.

It is an arithmetic number, because the mean of its divisors is an integer number (3132288).

Almost surely, 2^16661266 is an apocalyptic number.

16661266 is a deficient number, since it is larger than the sum of its proper divisors (8397038).

16661266 is a wasteful number, since it uses less digits than its factorization.

16661266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22136.

The product of its digits is 15552, while the sum is 34.

The square root of 16661266 is about 4081.8214071662. The cubic root of 16661266 is about 255.4088839384.

The spelling of 16661266 in words is "sixteen million, six hundred sixty-one thousand, two hundred sixty-six".