66711112 has 16 divisors (see below), whose sum is σ = 134705340. Its totient is φ = 30789696.

The previous prime is 66711091. The next prime is 66711131. The reversal of 66711112 is 21111766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66683556 + 27556 = 8166^2 + 166^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320623 + ... + 320830.

Almost surely, 2^66711112 is an apocalyptic number.

It is an amenable number.

66711112 is an abundant number, since it is smaller than the sum of its proper divisors (67994228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66711112 is a wasteful number, since it uses less digits than its factorization.

66711112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641472 (or 641468 counting only the distinct ones).

The product of its digits is 504, while the sum is 25.

The square root of 66711112 is about 8167.6870655039. The cubic root of 66711112 is about 405.5702215195.

Adding to 66711112 its reverse (21111766), we get a palindrome (87822878).

The spelling of 66711112 in words is "sixty-six million, seven hundred eleven thousand, one hundred twelve".