66847275 has 60 divisors (see below), whose sum is σ = 135126024. Its totient is φ = 32400000.

The previous prime is 66847267. The next prime is 66847279. The reversal of 66847275 is 57274866.

66847275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66847275 - 2³ = 66847267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66847275.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66847279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 20775 + ... + 23775.

Almost surely, 2^66847275 is an apocalyptic number.

66847275 is an abundant number, since it is smaller than the sum of its proper divisors (68278749).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66847275 is a wasteful number, since it uses less digits than its factorization.

66847275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034 (or 3020 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 66847275 is about 8176.0182852046. The cubic root of 66847275 is about 405.8459683275.

The spelling of 66847275 in words is "sixty-six million, eight hundred forty-seven thousand, two hundred seventy-five".