13660880 has 20 divisors (see below), whose sum is σ = 31761732. Its totient is φ = 5464320.

The previous prime is 13660859. The next prime is 13660891. The reversal of 13660880 is 8806631.

It can be written as a sum of positive squares in 2 ways, for example, as 5798464 + 7862416 = 2408^2 + 2804^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85301 + ... + 85460.

Almost surely, 2^13660880 is an apocalyptic number.

13660880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13660880 is an abundant number, since it is smaller than the sum of its proper divisors (18100852).

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

13660880 is a wasteful number, since it uses less digits than its factorization.

13660880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170774 (or 170768 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 13660880 is about 3696.0627700298. The cubic root of 13660880 is about 239.0522810646.

It can be divided in two parts, 136 and 60880, that added together give a palindrome (61016).

The spelling of 13660880 in words is "thirteen million, six hundred sixty thousand, eight hundred eighty".