66853375 has 8 divisors (see below), whose sum is σ = 83433168. Its totient is φ = 53482600.

The previous prime is 66853363. The next prime is 66853379. The reversal of 66853375 is 57335866.

It is not a de Polignac number, because 66853375 - 2¹⁷ = 66722303 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66853379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267289 + ... + 267538.

It is an arithmetic number, because the mean of its divisors is an integer number (10429146).

Almost surely, 2^66853375 is an apocalyptic number.

66853375 is a deficient number, since it is larger than the sum of its proper divisors (16579793).

66853375 is an equidigital number, since it uses as much as digits as its factorization.

66853375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534842 (or 534832 counting only the distinct ones).

The product of its digits is 453600, while the sum is 43.

The square root of 66853375 is about 8176.3913189133. The cubic root of 66853375 is about 405.8583128103.

The spelling of 66853375 in words is "sixty-six million, eight hundred fifty-three thousand, three hundred seventy-five".