66540112 has 20 divisors (see below), whose sum is σ = 130847776. Its totient is φ = 32772960.

The previous prime is 66540107. The next prime is 66540119. The reversal of 66540112 is 21104566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66540119) 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, 29964 + ... + 32107.

Almost surely, 2^66540112 is an apocalyptic number.

It is an amenable number.

66540112 is a deficient number, since it is larger than the sum of its proper divisors (64307664).

66540112 is a wasteful number, since it uses less digits than its factorization.

66540112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62146 (or 62140 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 66540112 is about 8157.2122689066. The cubic root of 66540112 is about 405.2233934963.

Adding to 66540112 its reverse (21104566), we get a palindrome (87644678).

The spelling of 66540112 in words is "sixty-six million, five hundred forty thousand, one hundred twelve".