666224203554 has 128 divisors (see below), whose sum is σ = 1918054656000. Its totient is φ = 166459696704.

The previous prime is 666224203531. The next prime is 666224203597. The reversal of 666224203554 is 455302422666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3474444 + ... + 3661175.

It is an arithmetic number, because the mean of its divisors is an integer number (14984802000).

Almost surely, 2^666224203554 is an apocalyptic number.

666224203554 is an abundant number, since it is smaller than the sum of its proper divisors (1251830452446).

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

666224203554 is a wasteful number, since it uses less digits than its factorization.

666224203554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7135669 (or 7135663 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 666224203554 in words is "six hundred sixty-six billion, two hundred twenty-four million, two hundred three thousand, five hundred fifty-four".