66787227 has 32 divisors (see below), whose sum is σ = 107251200. Its totient is φ = 40831776.

The previous prime is 66787211. The next prime is 66787249. The reversal of 66787227 is 72278766.

It is a happy number.

It is not a de Polignac number, because 66787227 - 2⁴ = 66787211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66787207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62298 + ... + 63360.

It is an arithmetic number, because the mean of its divisors is an integer number (3351600).

Almost surely, 2^66787227 is an apocalyptic number.

66787227 is a deficient number, since it is larger than the sum of its proper divisors (40463973).

66787227 is a wasteful number, since it uses less digits than its factorization.

66787227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264 (or 1258 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 66787227 is about 8172.3452570238. The cubic root of 66787227 is about 405.7244099468.

The spelling of 66787227 in words is "sixty-six million, seven hundred eighty-seven thousand, two hundred twenty-seven".