9446664666450 has 192 divisors, whose sum is σ = 27273993781248. Its totient is φ = 2138416358400.

The previous prime is 9446664666391. The next prime is 9446664666451. The reversal of 9446664666450 is 546664666449.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (9446664666451) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2236447 + ... + 4888253.

It is an arithmetic number, because the mean of its divisors is an integer number (142052050944).

Almost surely, 2^{9446664666450} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9446664666450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13636996890624).

9446664666450 is an abundant number, since it is smaller than the sum of its proper divisors (17827329114798).

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

9446664666450 is a wasteful number, since it uses less digits than its factorization.

9446664666450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651977 (or 2651972 counting only the distinct ones).

The product of its (nonzero) digits is 537477120, while the sum is 66.

The spelling of 9446664666450 in words is "nine trillion, four hundred forty-six billion, six hundred sixty-four million, six hundred sixty-six thousand, four hundred fifty".