1223445666790 has 16 divisors (see below), whose sum is σ = 2230078178880. Its totient is φ = 483183604800.

The previous prime is 1223445666727. The next prime is 1223445666791. The reversal of 1223445666790 is 976665443221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223445666791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774331911 + ... + 774333490.

It is an arithmetic number, because the mean of its divisors is an integer number (139379886180).

Almost surely, 2^{1223445666790} is an apocalyptic number.

1223445666790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1223445666790 is a deficient number, since it is larger than the sum of its proper divisors (1006632512090).

1223445666790 is a wasteful number, since it uses less digits than its factorization.

1223445666790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548665487.

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 1223445666790 in words is "one trillion, two hundred twenty-three billion, four hundred forty-five million, six hundred sixty-six thousand, seven hundred ninety".