223666784450 has 18 divisors (see below), whose sum is σ = 416026439289. Its totient is φ = 89465376120.

The previous prime is 223666784443. The next prime is 223666784479. The reversal of 223666784450 is 54487666322.

It can be written as a sum of positive squares in 2 ways, for example, as 219193448761 + 4473335689 = 468181^2 + 66883^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=334415.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223666784392 and 223666784401.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3310709 + ... + 3377591.

Almost surely, 2^223666784450 is an apocalyptic number.

223666784450 is a deficient number, since it is larger than the sum of its proper divisors (192359654839).

223666784450 is an frugal number, since it uses more digits than its factorization.

223666784450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133778 (or 66890 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 53.

The spelling of 223666784450 in words is "two hundred twenty-three billion, six hundred sixty-six million, seven hundred eighty-four thousand, four hundred fifty".