13455661 has 2 divisors, whose sum is σ = 13455662. Its totient is φ = 13455660.

The previous prime is 13455647. The next prime is 13455697. The reversal of 13455661 is 16655431.

13455661 is digitally balanced in base 2, 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., 10956100 + 2499561 = 3310^2 + 1581^2 .

It is a cyclic number.

It is not a de Polignac number, because 13455661 - 2⁹ = 13455149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13455641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6727830 + 6727831.

It is an arithmetic number, because the mean of its divisors is an integer number (6727831).

Almost surely, 2^13455661 is an apocalyptic number.

It is an amenable number.

13455661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13455661 is an equidigital number, since it uses as much as digits as its factorization.

13455661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 13455661 is about 3668.1958780850. The cubic root of 13455661 is about 237.8491912337.

The spelling of 13455661 in words is "thirteen million, four hundred fifty-five thousand, six hundred sixty-one".