1101016661 has 2 divisors, whose sum is σ = 1101016662. Its totient is φ = 1101016660.

The previous prime is 1101016643. The next prime is 1101016669. The reversal of 1101016661 is 1666101011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1005270436 + 95746225 = 31706^2 + 9785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101016661 - 2³⁰ = 27274837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101016669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550508330 + 550508331.

It is an arithmetic number, because the mean of its divisors is an integer number (550508331).

Almost surely, 2^1101016661 is an apocalyptic number.

It is an amenable number.

1101016661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101016661 is an equidigital number, since it uses as much as digits as its factorization.

1101016661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1101016661 is about 33181.5711050577. The cubic root of 1101016661 is about 1032.5980414497.

Adding to 1101016661 its reverse (1666101011), we get a palindrome (2767117672).

The spelling of 1101016661 in words is "one billion, one hundred one million, sixteen thousand, six hundred sixty-one".