111540666 has 16 divisors (see below), whose sum is σ = 230277888. Its totient is φ = 35980800.

The previous prime is 111540661. The next prime is 111540677. The reversal of 111540666 is 666045111.

It is not an unprimeable number, because it can be changed into a prime (111540661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299655 + ... + 300026.

It is an arithmetic number, because the mean of its divisors is an integer number (14392368).

Almost surely, 2^111540666 is an apocalyptic number.

111540666 is an abundant number, since it is smaller than the sum of its proper divisors (118737222).

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

111540666 is a wasteful number, since it uses less digits than its factorization.

111540666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599717.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 111540666 is about 10561.2814563385. The cubic root of 111540666 is about 481.3685854729.

Adding to 111540666 its reverse (666045111), we get a palindrome (777585777).

The spelling of 111540666 in words is "one hundred eleven million, five hundred forty thousand, six hundred sixty-six".