13356661 has 2 divisors, whose sum is σ = 13356662. Its totient is φ = 13356660.

The previous prime is 13356659. The next prime is 13356671. The reversal of 13356661 is 16665331.

13356661 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., 11015761 + 2340900 = 3319^2 + 1530^2 .

It is a cyclic number.

It is not a de Polignac number, because 13356661 - 2¹ = 13356659 is a prime.

Together with 13356659, it forms a pair of twin primes.

It is equal to p₈₇₀₉₄₃ and since 13356661 and 870943 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13356671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6678330 + 6678331.

It is an arithmetic number, because the mean of its divisors is an integer number (6678331).

Almost surely, 2^13356661 is an apocalyptic number.

It is an amenable number.

13356661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13356661 is an equidigital number, since it uses as much as digits as its factorization.

13356661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 31.

The square root of 13356661 is about 3654.6765930791. The cubic root of 13356661 is about 237.2644297637.

The spelling of 13356661 in words is "thirteen million, three hundred fifty-six thousand, six hundred sixty-one".