1226645666 has 8 divisors (see below), whose sum is σ = 1853399340. Its totient is φ = 608845888.

The previous prime is 1226645663. The next prime is 1226645677. The reversal of 1226645666 is 6665466221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1223530441 + 3115225 = 34979^2 + 1765^2 .

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 (1226645663) by changing a digit.

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, 2238131 + ... + 2238678.

Almost surely, 2^1226645666 is an apocalyptic number.

1226645666 is a deficient number, since it is larger than the sum of its proper divisors (626753674).

1226645666 is a wasteful number, since it uses less digits than its factorization.

1226645666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476948.

The product of its digits is 622080, while the sum is 44.

The square root of 1226645666 is about 35023.5016239096. The cubic root of 1226645666 is about 1070.4664068507.

The spelling of 1226645666 in words is "one billion, two hundred twenty-six million, six hundred forty-five thousand, six hundred sixty-six".