11680661 has 2 divisors, whose sum is σ = 11680662. Its totient is φ = 11680660.

The previous prime is 11680651. The next prime is 11680679. The reversal of 11680661 is 16608611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11356900 + 323761 = 3370^2 + 569^2 .

It is an emirp because it is prime and its reverse (16608611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11680661 - 2⁶ = 11680597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11680601) 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, 5840330 + 5840331.

It is an arithmetic number, because the mean of its divisors is an integer number (5840331).

Almost surely, 2^11680661 is an apocalyptic number.

It is an amenable number.

11680661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11680661 is an equidigital number, since it uses as much as digits as its factorization.

11680661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 11680661 is about 3417.6982020067. The cubic root of 11680661 is about 226.8937188045.

The spelling of 11680661 in words is "eleven million, six hundred eighty thousand, six hundred sixty-one".