1226416521666 has 32 divisors (see below), whose sum is σ = 2819441467008. Its totient is φ = 348379257600.

The previous prime is 1226416521647. The next prime is 1226416521697. The reversal of 1226416521666 is 6661256146221.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84386935 + ... + 84401466.

It is an arithmetic number, because the mean of its divisors is an integer number (88107545844).

Almost surely, 2^{1226416521666} is an apocalyptic number.

1226416521666 is an abundant number, since it is smaller than the sum of its proper divisors (1593024945342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1226416521666 is a wasteful number, since it uses less digits than its factorization.

1226416521666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168788586.

The product of its digits is 1244160, while the sum is 48.

The spelling of 1226416521666 in words is "one trillion, two hundred twenty-six billion, four hundred sixteen million, five hundred twenty-one thousand, six hundred sixty-six".