166111342573 has 6 divisors (see below), whose sum is σ = 182585194862. Its totient is φ = 151010311320.

The previous prime is 166111342517. The next prime is 166111342577. The reversal of 166111342573 is 375243111661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 103332031209 + 62779311364 = 321453^2 + 250558^2 .

It is not a de Polignac number, because 166111342573 - 2¹³ = 166111334381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166111342577) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 686410386 + ... + 686410627.

Almost surely, 2^166111342573 is an apocalyptic number.

It is an amenable number.

166111342573 is a deficient number, since it is larger than the sum of its proper divisors (16473852289).

166111342573 is a wasteful number, since it uses less digits than its factorization.

166111342573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372821035 (or 1372821024 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The spelling of 166111342573 in words is "one hundred sixty-six billion, one hundred eleven million, three hundred forty-two thousand, five hundred seventy-three".