111000660661 has 4 divisors (see below), whose sum is σ = 121091629824. Its totient is φ = 100909691500.

The previous prime is 111000660653. The next prime is 111000660671. The reversal of 111000660661 is 166066000111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111000660661 - 2³ = 111000660653 is a prime.

It is a super-2 number, since 2×111000660661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000660671) 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, 5045484565 + ... + 5045484586.

It is an arithmetic number, because the mean of its divisors is an integer number (30272907456).

Almost surely, 2^111000660661 is an apocalyptic number.

111000660661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111000660661 is a deficient number, since it is larger than the sum of its proper divisors (10090969163).

111000660661 is a wasteful number, since it uses less digits than its factorization.

111000660661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10090969162.

The product of its (nonzero) digits is 1296, while the sum is 28.

Adding to 111000660661 its reverse (166066000111), we get a palindrome (277066660772).

The spelling of 111000660661 in words is "one hundred eleven billion, six hundred sixty thousand, six hundred sixty-one".