66424159 has 4 divisors (see below), whose sum is σ = 66465904. Its totient is φ = 66382416.

The previous prime is 66424129. The next prime is 66424177. The reversal of 66424159 is 95142466.

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 66424159 - 2⁹ = 66423647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66424109) 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, 18387 + ... + 21700.

It is an arithmetic number, because the mean of its divisors is an integer number (16616476).

Almost surely, 2^66424159 is an apocalyptic number.

66424159 is a deficient number, since it is larger than the sum of its proper divisors (41745).

66424159 is a wasteful number, since it uses less digits than its factorization.

66424159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41744.

The product of its digits is 51840, while the sum is 37.

The square root of 66424159 is about 8150.1017785056. The cubic root of 66424159 is about 404.9878754690.

It can be divided in two parts, 6642 and 4159, that added together give a palindrome (10801).

The spelling of 66424159 in words is "sixty-six million, four hundred twenty-four thousand, one hundred fifty-nine".