166140111 has 8 divisors (see below), whose sum is σ = 222242944. Its totient is φ = 110398680.

The previous prime is 166140097. The next prime is 166140119. The reversal of 166140111 is 111041661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166140111 - 2⁷ = 166139983 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 (166140119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89275 + ... + 91116.

It is an arithmetic number, because the mean of its divisors is an integer number (27780368).

Almost surely, 2^166140111 is an apocalyptic number.

166140111 is a deficient number, since it is larger than the sum of its proper divisors (56102833).

166140111 is a wasteful number, since it uses less digits than its factorization.

166140111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180701.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 166140111 is about 12889.5349411839. The cubic root of 166140111 is about 549.7410472442.

Adding to 166140111 its reverse (111041661), we get a palindrome (277181772).

The spelling of 166140111 in words is "one hundred sixty-six million, one hundred forty thousand, one hundred eleven".