11601100661 has 2 divisors, whose sum is σ = 11601100662. Its totient is φ = 11601100660.

The previous prime is 11601100649. The next prime is 11601100673. The reversal of 11601100661 is 16600110611.

It is a balanced prime because it is at equal distance from previous prime (11601100649) and next prime (11601100673).

It can be written as a sum of positive squares in only one way, i.e., 6884020900 + 4717079761 = 82970^2 + 68681^2 .

It is a cyclic number.

It is not a de Polignac number, because 11601100661 - 2²⁶ = 11533991797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11601100061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5800550330 + 5800550331.

It is an arithmetic number, because the mean of its divisors is an integer number (5800550331).

Almost surely, 2^11601100661 is an apocalyptic number.

It is an amenable number.

11601100661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11601100661 is an equidigital number, since it uses as much as digits as its factorization.

11601100661 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 11601100661 in words is "eleven billion, six hundred one million, one hundred thousand, six hundred sixty-one".