221666002246412 has 12 divisors (see below), whose sum is σ = 387972525220056. Its totient is φ = 110816709326400.

The previous prime is 221666002246391. The next prime is 221666002246417. The reversal of 221666002246412 is 214642200666122.

It is not an unprimeable number, because it can be changed into a prime (221666002246417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4072918589 + ... + 4072973012.

It is an arithmetic number, because the mean of its divisors is an integer number (32331043768338).

Almost surely, 2^{221666002246412} is an apocalyptic number.

It is an amenable number.

221666002246412 is a deficient number, since it is larger than the sum of its proper divisors (166306522973644).

221666002246412 is a wasteful number, since it uses less digits than its factorization.

221666002246412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8145898408 (or 8145898406 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 44.

The spelling of 221666002246412 in words is "two hundred twenty-one trillion, six hundred sixty-six billion, two million, two hundred forty-six thousand, four hundred twelve".