1666867035222 has 192 divisors, whose sum is σ = 3939735840768. Its totient is φ = 508254912000.

The previous prime is 1666867035217. The next prime is 1666867035233. The reversal of 1666867035222 is 2225307686661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 93493473 + ... + 93511299.

It is an arithmetic number, because the mean of its divisors is an integer number (20519457504).

Almost surely, 2^{1666867035222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666867035222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1969867920384).

1666867035222 is an abundant number, since it is smaller than the sum of its proper divisors (2272868805546).

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

1666867035222 is a wasteful number, since it uses less digits than its factorization.

1666867035222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18035 (or 18032 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 1666867035222 in words is "one trillion, six hundred sixty-six billion, eight hundred sixty-seven million, thirty-five thousand, two hundred twenty-two".