166065868280 has 32 divisors (see below), whose sum is σ = 402390374400. Its totient is φ = 61316628096.

The previous prime is 166065868273. The next prime is 166065868343. The reversal of 166065868280 is 82868560661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159678200 + ... + 159679239.

It is an arithmetic number, because the mean of its divisors is an integer number (12574699200).

Almost surely, 2^166065868280 is an apocalyptic number.

166065868280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166065868280 is an abundant number, since it is smaller than the sum of its proper divisors (236324506120).

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

166065868280 is a wasteful number, since it uses less digits than its factorization.

166065868280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319357463 (or 319357459 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 56.

The spelling of 166065868280 in words is "one hundred sixty-six billion, sixty-five million, eight hundred sixty-eight thousand, two hundred eighty".