66931227 has 24 divisors (see below), whose sum is σ = 111674160. Its totient is φ = 38177280.

The previous prime is 66931211. The next prime is 66931231. The reversal of 66931227 is 72213966.

It is not a de Polignac number, because 66931227 - 2⁴ = 66931211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66931191 and 66931200.

It is not an unprimeable number, because it can be changed into a prime (66931027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18202 + ... + 21567.

It is an arithmetic number, because the mean of its divisors is an integer number (4653090).

Almost surely, 2^66931227 is an apocalyptic number.

66931227 is a deficient number, since it is larger than the sum of its proper divisors (44742933).

66931227 is a wasteful number, since it uses less digits than its factorization.

66931227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39803 (or 39800 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 66931227 is about 8181.1507136833. The cubic root of 66931227 is about 406.0157948833.

The spelling of 66931227 in words is "sixty-six million, nine hundred thirty-one thousand, two hundred twenty-seven".