1111027661 has 8 divisors (see below), whose sum is σ = 1126929720. Its totient is φ = 1095144192.

The previous prime is 1111027657. The next prime is 1111027663. The reversal of 1111027661 is 1667201111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10048900 + 1100978761 = 3170^2 + 33181^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1111027661 - 2² = 1111027657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111027661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111027663) 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, 153635 + ... + 160703.

It is an arithmetic number, because the mean of its divisors is an integer number (140866215).

Almost surely, 2^1111027661 is an apocalyptic number.

It is an amenable number.

1111027661 is a deficient number, since it is larger than the sum of its proper divisors (15902059).

1111027661 is an equidigital number, since it uses as much as digits as its factorization.

1111027661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9295.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1111027661 is about 33332.0815581626. The cubic root of 1111027661 is about 1035.7182381123.

Adding to 1111027661 its reverse (1667201111), we get a palindrome (2778228772).

The spelling of 1111027661 in words is "one billion, one hundred eleven million, twenty-seven thousand, six hundred sixty-one".