1117722661 has 16 divisors (see below), whose sum is σ = 1234408896. Its totient is φ = 1003600000.

The previous prime is 1117722659. The next prime is 1117722667. The reversal of 1117722661 is 1662277111.

It is a cyclic number.

It is not a de Polignac number, because 1117722661 - 2¹ = 1117722659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1117722667) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 577866 + ... + 579796.

It is an arithmetic number, because the mean of its divisors is an integer number (77150556).

Almost surely, 2^1117722661 is an apocalyptic number.

1117722661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1117722661 is a deficient number, since it is larger than the sum of its proper divisors (116686235).

1117722661 is a wasteful number, since it uses less digits than its factorization.

1117722661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564.

The product of its digits is 7056, while the sum is 34.

The square root of 1117722661 is about 33432.3594889742. The cubic root of 1117722661 is about 1037.7944695857.

Adding to 1117722661 its reverse (1662277111), we get a palindrome (2779999772).

The spelling of 1117722661 in words is "one billion, one hundred seventeen million, seven hundred twenty-two thousand, six hundred sixty-one".