166643028894 has 24 divisors (see below), whose sum is σ = 338046404040. Its totient is φ = 54765304720.

The previous prime is 166643028847. The next prime is 166643028931. The reversal of 166643028894 is 498820346661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2724549 + ... + 2785040.

It is an arithmetic number, because the mean of its divisors is an integer number (14085266835).

Almost surely, 2^166643028894 is an apocalyptic number.

166643028894 is an abundant number, since it is smaller than the sum of its proper divisors (171403375146).

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

166643028894 is an equidigital number, since it uses as much as digits as its factorization.

166643028894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5509736 (or 5509665 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 57.

The spelling of 166643028894 in words is "one hundred sixty-six billion, six hundred forty-three million, twenty-eight thousand, eight hundred ninety-four".