66847133 has 4 divisors (see below), whose sum is σ = 66864000. Its totient is φ = 66830268.

The previous prime is 66847127. The next prime is 66847159. The reversal of 66847133 is 33174866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66847133 - 2¹⁴ = 66830749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66847163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118 + ... + 11616.

It is an arithmetic number, because the mean of its divisors is an integer number (16716000).

Almost surely, 2^66847133 is an apocalyptic number.

It is an amenable number.

66847133 is a deficient number, since it is larger than the sum of its proper divisors (16867).

66847133 is a wasteful number, since it uses less digits than its factorization.

66847133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16866.

The product of its digits is 72576, while the sum is 38.

The square root of 66847133 is about 8176.0096012664. The cubic root of 66847133 is about 405.8456809552.

The spelling of 66847133 in words is "sixty-six million, eight hundred forty-seven thousand, one hundred thirty-three".