3011611661 has 2 divisors, whose sum is σ = 3011611662. Its totient is φ = 3011611660.

The previous prime is 3011611657. The next prime is 3011611667. The reversal of 3011611661 is 1661161103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2536633225 + 474978436 = 50365^2 + 21794^2 .

It is a cyclic number.

It is not a de Polignac number, because 3011611661 - 2² = 3011611657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3011611661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3011611667) 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 as a sum of consecutive naturals, namely, 1505805830 + 1505805831.

It is an arithmetic number, because the mean of its divisors is an integer number (1505805831).

Almost surely, 2^3011611661 is an apocalyptic number.

It is an amenable number.

3011611661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3011611661 is an equidigital number, since it uses as much as digits as its factorization.

3011611661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 3011611661 is about 54878.1528570341. The cubic root of 3011611661 is about 1444.1079428430.

Adding to 3011611661 its reverse (1661161103), we get a palindrome (4672772764).

The spelling of 3011611661 in words is "three billion, eleven million, six hundred eleven thousand, six hundred sixty-one".