166257443 has 4 divisors (see below), whose sum is σ = 181371768. Its totient is φ = 151143120.

The previous prime is 166257431. The next prime is 166257473. The reversal of 166257443 is 344752661.

It is a happy number.

166257443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166257443 - 2⁶ = 166257379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166257397 and 166257406.

It is not an unprimeable number, because it can be changed into a prime (166257473) 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, 7557146 + ... + 7557167.

It is an arithmetic number, because the mean of its divisors is an integer number (45342942).

Almost surely, 2^166257443 is an apocalyptic number.

166257443 is a deficient number, since it is larger than the sum of its proper divisors (15114325).

166257443 is a wasteful number, since it uses less digits than its factorization.

166257443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15114324.

The product of its digits is 120960, while the sum is 38.

The square root of 166257443 is about 12894.0855821574. The cubic root of 166257443 is about 549.8704300842.

The spelling of 166257443 in words is "one hundred sixty-six million, two hundred fifty-seven thousand, four hundred forty-three".