13660985 has 8 divisors (see below), whose sum is σ = 17654280. Its totient is φ = 10088064.

The previous prime is 13660967. The next prime is 13660991. The reversal of 13660985 is 58906631.

13660985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 258064 + 13402921 = 508^2 + 3661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13660985 is a prime.

It is a super-2 number, since 2×13660985² = 373245022340450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105020 + ... + 105149.

It is an arithmetic number, because the mean of its divisors is an integer number (2206785).

Almost surely, 2^13660985 is an apocalyptic number.

It is an amenable number.

13660985 is a deficient number, since it is larger than the sum of its proper divisors (3993295).

13660985 is a wasteful number, since it uses less digits than its factorization.

13660985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210187.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 13660985 is about 3696.0769743067. The cubic root of 13660985 is about 239.0528935294.

The spelling of 13660985 in words is "thirteen million, six hundred sixty thousand, nine hundred eighty-five".