445665171666 has 64 divisors (see below), whose sum is σ = 1047350062080. Its totient is φ = 124638642240.

The previous prime is 445665171649. The next prime is 445665171667. The reversal of 445665171666 is 666171566544.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (445665171667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4916905 + ... + 5006723.

It is an arithmetic number, because the mean of its divisors is an integer number (16364844720).

Almost surely, 2^445665171666 is an apocalyptic number.

445665171666 is an abundant number, since it is smaller than the sum of its proper divisors (601684890414).

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

445665171666 is a wasteful number, since it uses less digits than its factorization.

445665171666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95631.

The product of its digits is 21772800, while the sum is 57.

The spelling of 445665171666 in words is "four hundred forty-five billion, six hundred sixty-five million, one hundred seventy-one thousand, six hundred sixty-six".