135666171 has 64 divisors (see below), whose sum is σ = 223171200. Its totient is φ = 82114560.

The previous prime is 135666169. The next prime is 135666191. The reversal of 135666171 is 171666531.

135666171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135666171 - 2¹ = 135666169 is a prime.

Its product of digits (22680) is a multiple of the sum of its prime factors (168).

It is not an unprimeable number, because it can be changed into a prime (135666131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1524295 + ... + 1524383.

It is an arithmetic number, because the mean of its divisors is an integer number (3487050).

Almost surely, 2^135666171 is an apocalyptic number.

135666171 is a deficient number, since it is larger than the sum of its proper divisors (87505029).

135666171 is an frugal number, since it uses more digits than its factorization.

135666171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 150 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 135666171 is about 11647.5821954601. The cubic root of 135666171 is about 513.8352045799.

The spelling of 135666171 in words is "one hundred thirty-five million, six hundred sixty-six thousand, one hundred seventy-one".