1666323226 has 8 divisors (see below), whose sum is σ = 2500262964. Its totient is φ = 832902240.

The previous prime is 1666323223. The next prime is 1666323227. The reversal of 1666323226 is 6223236661.

It can be written as a sum of positive squares in 2 ways, for example, as 1501175025 + 165148201 = 38745^2 + 12851^2 .

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 (1666323223) 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, 121555 + ... + 134566.

Almost surely, 2^1666323226 is an apocalyptic number.

1666323226 is a deficient number, since it is larger than the sum of its proper divisors (833939738).

1666323226 is a wasteful number, since it uses less digits than its factorization.

1666323226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259376.

The product of its digits is 93312, while the sum is 37.

The square root of 1666323226 is about 40820.6225577220. The cubic root of 1666323226 is about 1185.5496571150.

Adding to 1666323226 its reverse (6223236661), we get a palindrome (7889559887).

The spelling of 1666323226 in words is "one billion, six hundred sixty-six million, three hundred twenty-three thousand, two hundred twenty-six".