166135143 has 32 divisors (see below), whose sum is σ = 234420480. Its totient is φ = 104544000.

The previous prime is 166135139. The next prime is 166135153. The reversal of 166135143 is 341531661.

It is not a de Polignac number, because 166135143 - 2² = 166135139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166135143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166135103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 661768 + ... + 662018.

It is an arithmetic number, because the mean of its divisors is an integer number (7325640).

Almost surely, 2^166135143 is an apocalyptic number.

166135143 is a deficient number, since it is larger than the sum of its proper divisors (68285337).

166135143 is a wasteful number, since it uses less digits than its factorization.

166135143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447.

The product of its digits is 6480, while the sum is 30.

The square root of 166135143 is about 12889.3422252650. The cubic root of 166135143 is about 549.7355676508.

The spelling of 166135143 in words is "one hundred sixty-six million, one hundred thirty-five thousand, one hundred forty-three".