13767661 has 2 divisors, whose sum is σ = 13767662. Its totient is φ = 13767660.

The previous prime is 13767653. The next prime is 13767679. The reversal of 13767661 is 16676731.

13767661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13286025 + 481636 = 3645^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 13767661 - 2³ = 13767653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13767661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13767631) 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, 6883830 + 6883831.

It is an arithmetic number, because the mean of its divisors is an integer number (6883831).

Almost surely, 2^13767661 is an apocalyptic number.

It is an amenable number.

13767661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13767661 is an equidigital number, since it uses as much as digits as its factorization.

13767661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 13767661 is about 3710.4798881007. The cubic root of 13767661 is about 239.6735202007.

The spelling of 13767661 in words is "thirteen million, seven hundred sixty-seven thousand, six hundred sixty-one".