13466561 has 4 divisors (see below), whose sum is σ = 13474224. Its totient is φ = 13458900.

The previous prime is 13466539. The next prime is 13466627. The reversal of 13466561 is 16566431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13466561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13466521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266 + ... + 5196.

It is an arithmetic number, because the mean of its divisors is an integer number (3368556).

Almost surely, 2^13466561 is an apocalyptic number.

It is an amenable number.

13466561 is a deficient number, since it is larger than the sum of its proper divisors (7663).

13466561 is an equidigital number, since it uses as much as digits as its factorization.

13466561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7662.

The product of its digits is 12960, while the sum is 32.

The square root of 13466561 is about 3669.6813213139. The cubic root of 13466561 is about 237.9133985699.

The spelling of 13466561 in words is "thirteen million, four hundred sixty-six thousand, five hundred sixty-one".