66424043 has 4 divisors (see below), whose sum is σ = 75913200. Its totient is φ = 56934888.

The previous prime is 66424027. The next prime is 66424081. The reversal of 66424043 is 34042466.

It is a happy number.

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 66424043 - 2⁴ = 66424027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66423997 and 66424015.

It is not an unprimeable number, because it can be changed into a prime (66424013) 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, 4744568 + ... + 4744581.

It is an arithmetic number, because the mean of its divisors is an integer number (18978300).

Almost surely, 2^66424043 is an apocalyptic number.

66424043 is a deficient number, since it is larger than the sum of its proper divisors (9489157).

66424043 is an equidigital number, since it uses as much as digits as its factorization.

66424043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9489156.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 66424043 is about 8150.0946620269. The cubic root of 66424043 is about 404.9876397183.

The spelling of 66424043 in words is "sixty-six million, four hundred twenty-four thousand, forty-three".