111622666 has 4 divisors (see below), whose sum is σ = 167434002. Its totient is φ = 55811332.

The previous prime is 111622639. The next prime is 111622681. The reversal of 111622666 is 666226111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666226111 = 617 ⋅1079783.

It can be written as a sum of positive squares in only one way, i.e., 110691441 + 931225 = 10521^2 + 965^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27905665 + ... + 27905668.

Almost surely, 2^111622666 is an apocalyptic number.

111622666 is a deficient number, since it is larger than the sum of its proper divisors (55811336).

111622666 is an equidigital number, since it uses as much as digits as its factorization.

111622666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55811335.

The product of its digits is 5184, while the sum is 31.

The square root of 111622666 is about 10565.1628477748. The cubic root of 111622666 is about 481.4865172151.

Adding to 111622666 its reverse (666226111), we get a palindrome (777848777).

The spelling of 111622666 in words is "one hundred eleven million, six hundred twenty-two thousand, six hundred sixty-six".