13081664 has 28 divisors (see below), whose sum is σ = 27090624. Its totient is φ = 6255744.

The previous prime is 13081631. The next prime is 13081667. The reversal of 13081664 is 46618031.

It is a super-2 number, since 2×13081664² = 342259866017792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13081667) 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, 2972 + ... + 5915.

Almost surely, 2^13081664 is an apocalyptic number.

It is an amenable number.

13081664 is an abundant number, since it is smaller than the sum of its proper divisors (14008960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13081664 is an equidigital number, since it uses as much as digits as its factorization.

13081664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8922 (or 8912 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 13081664 is about 3616.8583052146. The cubic root of 13081664 is about 235.6247988094.

Adding to 13081664 its reverse (46618031), we get a palindrome (59699695).

The spelling of 13081664 in words is "thirteen million, eighty-one thousand, six hundred sixty-four".