166783442487844 has 72 divisors (see below), whose sum is σ = 373654805146560. Its totient is φ = 63705081428352.

The previous prime is 166783442487833. The next prime is 166783442487917. The reversal of 166783442487844 is 448784244387661.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 607550134 + ... + 607824589.

It is an arithmetic number, because the mean of its divisors is an integer number (5189650071480).

Almost surely, 2^{166783442487844} is an apocalyptic number.

166783442487844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166783442487844 is an abundant number, since it is smaller than the sum of its proper divisors (206871362658716).

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

166783442487844 is a wasteful number, since it uses less digits than its factorization.

166783442487844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215374789 (or 1215374774 counting only the distinct ones).

The product of its digits is 5549064192, while the sum is 76.

The spelling of 166783442487844 in words is "one hundred sixty-six trillion, seven hundred eighty-three billion, four hundred forty-two million, four hundred eighty-seven thousand, eight hundred forty-four".