1666226 has 8 divisors (see below), whose sum is σ = 2512620. Its totient is φ = 828688.

The previous prime is 1666213. The next prime is 1666237. The reversal of 1666226 is 6226661.

It can be written as a sum of positive squares in 2 ways, for example, as 1002001 + 664225 = 1001^2 + 815^2 .

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

It is a pancake number, because a pancake can be divided into 1666226 parts by 1825 straight cuts.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1721 + ... + 2508.

2^1666226 is an apocalyptic number.

1666226 is a deficient number, since it is larger than the sum of its proper divisors (846394).

1666226 is a wasteful number, since it uses less digits than its factorization.

1666226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428.

The product of its digits is 5184, while the sum is 29.

The square root of 1666226 is about 1290.8237679869. The cubic root of 1666226 is about 118.5526598665.

The spelling of 1666226 in words is "one million, six hundred sixty-six thousand, two hundred twenty-six".