13660648 has 8 divisors (see below), whose sum is σ = 25613730. Its totient is φ = 6830320.

The previous prime is 13660637. The next prime is 13660649. The reversal of 13660648 is 84606631.

It can be written as a sum of positive squares in only one way, i.e., 10355524 + 3305124 = 3218^2 + 1818^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×13660648² = 373226607559808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13660649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 853783 + ... + 853798.

Almost surely, 2^13660648 is an apocalyptic number.

It is an amenable number.

13660648 is a deficient number, since it is larger than the sum of its proper divisors (11953082).

13660648 is a wasteful number, since it uses less digits than its factorization.

13660648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707587 (or 1707583 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 13660648 is about 3696.0313851481. The cubic root of 13660648 is about 239.0509277979.

The spelling of 13660648 in words is "thirteen million, six hundred sixty thousand, six hundred forty-eight".