1223456666790 has 32 divisors (see below), whose sum is σ = 3031015228416. Its totient is φ = 315730752480.

The previous prime is 1223456666779. The next prime is 1223456666797. The reversal of 1223456666790 is 976666543221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223456666790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223456666797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 657771472 + ... + 657773331.

It is an arithmetic number, because the mean of its divisors is an integer number (94719225888).

Almost surely, 2^{1223456666790} is an apocalyptic number.

1223456666790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1223456666790 is an abundant number, since it is smaller than the sum of its proper divisors (1807558561626).

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

1223456666790 is a wasteful number, since it uses less digits than its factorization.

1223456666790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315544844.

The product of its (nonzero) digits is 19595520, while the sum is 57.

The spelling of 1223456666790 in words is "one trillion, two hundred twenty-three billion, four hundred fifty-six million, six hundred sixty-six thousand, seven hundred ninety".