166537888735660 has 96 divisors (see below), whose sum is σ = 387432290246400. Its totient is φ = 59740124559360.

The previous prime is 166537888735643. The next prime is 166537888735663. The reversal of 166537888735660 is 66537888735661.

It is not an unprimeable number, because it can be changed into a prime (166537888735663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30135715 + ... + 35231194.

It is an arithmetic number, because the mean of its divisors is an integer number (4035753023400).

Almost surely, 2^{166537888735660} is an apocalyptic number.

166537888735660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166537888735660 is an abundant number, since it is smaller than the sum of its proper divisors (220894401510740).

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

166537888735660 is a wasteful number, since it uses less digits than its factorization.

166537888735660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65367211 (or 65367209 counting only the distinct ones).

The product of its (nonzero) digits is 7315660800, while the sum is 79.

Subtracting from 166537888735660 its reverse (66537888735661), we obtain a palindrome (99999999999999).

The spelling of 166537888735660 in words is "one hundred sixty-six trillion, five hundred thirty-seven billion, eight hundred eighty-eight million, seven hundred thirty-five thousand, six hundred sixty".