1115160661 has 2 divisors, whose sum is σ = 1115160662. Its totient is φ = 1115160660.

The previous prime is 1115160659. The next prime is 1115160671. The reversal of 1115160661 is 1660615111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1082739025 + 32421636 = 32905^2 + 5694^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115160661 - 2¹ = 1115160659 is a prime.

Together with 1115160659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115160671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557580330 + 557580331.

It is an arithmetic number, because the mean of its divisors is an integer number (557580331).

Almost surely, 2^1115160661 is an apocalyptic number.

It is an amenable number.

1115160661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115160661 is an equidigital number, since it uses as much as digits as its factorization.

1115160661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 1115160661 is about 33394.0213361614. The cubic root of 1115160661 is about 1037.0009323923. Note that the first 3 decimals are identical.

Adding to 1115160661 its reverse (1660615111), we get a palindrome (2775775772).

The spelling of 1115160661 in words is "one billion, one hundred fifteen million, one hundred sixty thousand, six hundred sixty-one".