166252143 has 4 divisors (see below), whose sum is σ = 221669528. Its totient is φ = 110834760.

The previous prime is 166252117. The next prime is 166252153. The reversal of 166252143 is 341252661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341252661 = 3 ⋅113750887.

It is not a de Polignac number, because 166252143 - 2⁸ = 166251887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166252143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166252153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27708688 + ... + 27708693.

It is an arithmetic number, because the mean of its divisors is an integer number (55417382).

Almost surely, 2^166252143 is an apocalyptic number.

166252143 is a deficient number, since it is larger than the sum of its proper divisors (55417385).

166252143 is an equidigital number, since it uses as much as digits as its factorization.

166252143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55417384.

The product of its digits is 8640, while the sum is 30.

The square root of 166252143 is about 12893.8800599354. The cubic root of 166252143 is about 549.8645870490.

The spelling of 166252143 in words is "one hundred sixty-six million, two hundred fifty-two thousand, one hundred forty-three".