166913844805 has 16 divisors (see below), whose sum is σ = 203359834944. Its totient is φ = 131490374400.

The previous prime is 166913844791. The next prime is 166913844821. The reversal of 166913844805 is 508448319661.

It is not a de Polignac number, because 166913844805 - 2¹¹ = 166913842757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849394 + ... + 1027276.

It is an arithmetic number, because the mean of its divisors is an integer number (12709989684).

Almost surely, 2^166913844805 is an apocalyptic number.

It is an amenable number.

166913844805 is a deficient number, since it is larger than the sum of its proper divisors (36445990139).

166913844805 is a wasteful number, since it uses less digits than its factorization.

166913844805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180756.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 166913844805 in words is "one hundred sixty-six billion, nine hundred thirteen million, eight hundred forty-four thousand, eight hundred five".