166548845661 has 96 divisors (see below), whose sum is σ = 265623684480. Its totient is φ = 92426780160.

The previous prime is 166548845641. The next prime is 166548845663.

It is a happy number.

166548845661 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 166548845661 - 2⁹ = 166548845149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166548845595 and 166548845604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166548845663) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 40062595 + ... + 40066751.

It is an arithmetic number, because the mean of its divisors is an integer number (2766913380).

Almost surely, 2^166548845661 is an apocalyptic number.

166548845661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166548845661 is a deficient number, since it is larger than the sum of its proper divisors (99074838819).

166548845661 is a wasteful number, since it uses less digits than its factorization.

166548845661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395 (or 4384 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 60.

The spelling of 166548845661 in words is "one hundred sixty-six billion, five hundred forty-eight million, eight hundred forty-five thousand, six hundred sixty-one".