66347285 has 8 divisors (see below), whose sum is σ = 82185216. Its totient is φ = 51365520.

The previous prime is 66347269. The next prime is 66347293. The reversal of 66347285 is 58274366.

It is a happy number.

66347285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66347285 - 2⁴ = 66347269 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 213869 + ... + 214178.

It is an arithmetic number, because the mean of its divisors is an integer number (10273152).

Almost surely, 2^66347285 is an apocalyptic number.

It is an amenable number.

66347285 is a deficient number, since it is larger than the sum of its proper divisors (15837931).

66347285 is a wasteful number, since it uses less digits than its factorization.

66347285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428083.

The product of its digits is 241920, while the sum is 41.

The square root of 66347285 is about 8145.3842757724. The cubic root of 66347285 is about 404.8315816524.

The spelling of 66347285 in words is "sixty-six million, three hundred forty-seven thousand, two hundred eighty-five".