611056000661 has 2 divisors, whose sum is σ = 611056000662. Its totient is φ = 611056000660.

The previous prime is 611056000657. The next prime is 611056000663. The reversal of 611056000661 is 166000650116.

611056000661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450651745636 + 160404255025 = 671306^2 + 400505^2 .

It is a cyclic number.

It is not a de Polignac number, because 611056000661 - 2² = 611056000657 is a prime.

Together with 611056000663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611056000663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305528000330 + 305528000331.

It is an arithmetic number, because the mean of its divisors is an integer number (305528000331).

Almost surely, 2^611056000661 is an apocalyptic number.

It is an amenable number.

611056000661 is a deficient number, since it is larger than the sum of its proper divisors (1).

611056000661 is an equidigital number, since it uses as much as digits as its factorization.

611056000661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

Adding to 611056000661 its reverse (166000650116), we get a palindrome (777056650777).

The spelling of 611056000661 in words is "six hundred eleven billion, fifty-six million, six hundred sixty-one", and thus it is an aban number.