66847912 has 16 divisors (see below), whose sum is σ = 128007360. Its totient is φ = 32712624.

The previous prime is 66847901. The next prime is 66847919. The reversal of 66847912 is 21974866.

It is not an unprimeable number, because it can be changed into a prime (66847919) 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, 88518 + ... + 89269.

It is an arithmetic number, because the mean of its divisors is an integer number (8000460).

Almost surely, 2^66847912 is an apocalyptic number.

It is an amenable number.

66847912 is a deficient number, since it is larger than the sum of its proper divisors (61159448).

66847912 is a wasteful number, since it uses less digits than its factorization.

66847912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177840 (or 177836 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 66847912 is about 8176.0572405041. The cubic root of 66847912 is about 405.8472574504.

The spelling of 66847912 in words is "sixty-six million, eight hundred forty-seven thousand, nine hundred twelve".