66424023 has 16 divisors (see below), whose sum is σ = 102685440. Its totient is φ = 42356952.

The previous prime is 66424013. The next prime is 66424027. The reversal of 66424023 is 32042466.

It is not a de Polignac number, because 66424023 - 2⁸ = 66423767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66424027) 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 15 ways as a sum of consecutive naturals, for example, 52861 + ... + 54102.

It is an arithmetic number, because the mean of its divisors is an integer number (6417840).

Almost surely, 2^66424023 is an apocalyptic number.

66424023 is a deficient number, since it is larger than the sum of its proper divisors (36261417).

66424023 is a wasteful number, since it uses less digits than its factorization.

66424023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106995 (or 106989 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 66424023 is about 8150.0934350472. The cubic root of 66424023 is about 404.9875990716.

Adding to 66424023 its reverse (32042466), we get a palindrome (98466489).

The spelling of 66424023 in words is "sixty-six million, four hundred twenty-four thousand, twenty-three".