166111141 has 4 divisors (see below), whose sum is σ = 189841312. Its totient is φ = 142380972.

The previous prime is 166111133. The next prime is 166111163. The reversal of 166111141 is 141111661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166111141 - 2³ = 166111133 is a prime.

It is a super-2 number, since 2×166111141² = 55185822328643762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166111111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11865075 + ... + 11865088.

It is an arithmetic number, because the mean of its divisors is an integer number (47460328).

Almost surely, 2^166111141 is an apocalyptic number.

It is an amenable number.

166111141 is a deficient number, since it is larger than the sum of its proper divisors (23730171).

166111141 is an equidigital number, since it uses as much as digits as its factorization.

166111141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23730170.

The product of its digits is 144, while the sum is 22.

The square root of 166111141 is about 12888.4111123133. The cubic root of 166111141 is about 549.7090924405.

The spelling of 166111141 in words is "one hundred sixty-six million, one hundred eleven thousand, one hundred forty-one".