66459143 has 4 divisors (see below), whose sum is σ = 66603768. Its totient is φ = 66314520.

The previous prime is 66459119. The next prime is 66459149. The reversal of 66459143 is 34195466.

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 66459143 - 2⁶ = 66459079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66459097 and 66459106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66459149) 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, 71621 + ... + 72542.

It is an arithmetic number, because the mean of its divisors is an integer number (16650942).

Almost surely, 2^66459143 is an apocalyptic number.

66459143 is a deficient number, since it is larger than the sum of its proper divisors (144625).

66459143 is a wasteful number, since it uses less digits than its factorization.

66459143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144624.

The product of its digits is 77760, while the sum is 38.

The square root of 66459143 is about 8152.2477268542. The cubic root of 66459143 is about 405.0589621009.

The spelling of 66459143 in words is "sixty-six million, four hundred fifty-nine thousand, one hundred forty-three".