16662266 has 8 divisors (see below), whose sum is σ = 25010964. Its totient is φ = 8325280.

The previous prime is 16662263. The next prime is 16662271. The reversal of 16662266 is 66226661.

It can be written as a sum of positive squares in 2 ways, for example, as 16638241 + 24025 = 4079^2 + 155^2 .

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

It is a super-2 number, since 2×16662266² = 555262216509512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16662263) 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, 3176 + ... + 6588.

Almost surely, 2^16662266 is an apocalyptic number.

16662266 is a deficient number, since it is larger than the sum of its proper divisors (8348698).

16662266 is a wasteful number, since it uses less digits than its factorization.

16662266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5856.

The product of its digits is 31104, while the sum is 35.

The square root of 16662266 is about 4081.9438996635. The cubic root of 16662266 is about 255.4139936697.

The spelling of 16662266 in words is "sixteen million, six hundred sixty-two thousand, two hundred sixty-six".