66624423 has 8 divisors (see below), whose sum is σ = 89179248. Its totient is φ = 44242944.

The previous prime is 66624407. The next prime is 66624433. The reversal of 66624423 is 32442666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66624423 - 2⁴ = 66624407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66624403) 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 7 ways as a sum of consecutive naturals, for example, 42436 + ... + 43977.

It is an arithmetic number, because the mean of its divisors is an integer number (11147406).

Almost surely, 2^66624423 is an apocalyptic number.

66624423 is a deficient number, since it is larger than the sum of its proper divisors (22554825).

66624423 is a wasteful number, since it uses less digits than its factorization.

66624423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86673.

The product of its digits is 41472, while the sum is 33.

The square root of 66624423 is about 8162.3785136442. The cubic root of 66624423 is about 405.3944701042.

The spelling of 66624423 in words is "sixty-six million, six hundred twenty-four thousand, four hundred twenty-three".