66847225 has 12 divisors (see below), whose sum is σ = 87253840. Its totient is φ = 50662800.

The previous prime is 66847219. The next prime is 66847243. The reversal of 66847225 is 52274866.

It is not a de Polignac number, because 66847225 - 2¹⁵ = 66814457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69891 + ... + 70840.

Almost surely, 2^66847225 is an apocalyptic number.

It is an amenable number.

66847225 is a deficient number, since it is larger than the sum of its proper divisors (20406615).

66847225 is a wasteful number, since it uses less digits than its factorization.

66847225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140760 (or 140755 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 66847225 is about 8176.0152274809. The cubic root of 66847225 is about 405.8458671401.

The spelling of 66847225 in words is "sixty-six million, eight hundred forty-seven thousand, two hundred twenty-five".