166866808735 has 48 divisors (see below), whose sum is σ = 223365371040. Its totient is φ = 119560320000.

The previous prime is 166866808733. The next prime is 166866808777. The reversal of 166866808735 is 537808668661.

It is not a de Polignac number, because 166866808735 - 2¹ = 166866808733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166866808733) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55602235 + ... + 55605235.

It is an arithmetic number, because the mean of its divisors is an integer number (4653445230).

Almost surely, 2^166866808735 is an apocalyptic number.

166866808735 is a deficient number, since it is larger than the sum of its proper divisors (56498562305).

166866808735 is a wasteful number, since it uses less digits than its factorization.

166866808735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360 (or 4349 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 64.

The spelling of 166866808735 in words is "one hundred sixty-six billion, eight hundred sixty-six million, eight hundred eight thousand, seven hundred thirty-five".