66424275 has 18 divisors (see below), whose sum is σ = 118973660. Its totient is φ = 35426160.

The previous prime is 66424229. The next prime is 66424279. The reversal of 66424275 is 57242466.

66424275 is a `hidden beast` number, since 6 + 642 + 4 + 2 + 7 + 5 = 666.

It is not a de Polignac number, because 66424275 - 2¹⁷ = 66293203 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66424279) 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 17 ways as a sum of consecutive naturals, for example, 147385 + ... + 147834.

Almost surely, 2^66424275 is an apocalyptic number.

66424275 is a deficient number, since it is larger than the sum of its proper divisors (52549385).

66424275 is a wasteful number, since it uses less digits than its factorization.

66424275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295235 (or 295227 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 66424275 is about 8150.1088949780. The cubic root of 66424275 is about 404.9881112194.

The spelling of 66424275 in words is "sixty-six million, four hundred twenty-four thousand, two hundred seventy-five".