13666065 has 32 divisors (see below), whose sum is σ = 25178880. Its totient is φ = 6200064.

The previous prime is 13666031. The next prime is 13666067. The reversal of 13666065 is 56066631.

It is not a de Polignac number, because 13666065 - 2¹³ = 13657873 is a prime.

It is a super-2 number, since 2×13666065² = 373522665168450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13666067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16071 + ... + 16899.

It is an arithmetic number, because the mean of its divisors is an integer number (786840).

Almost surely, 2^13666065 is an apocalyptic number.

13666065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13666065 is a deficient number, since it is larger than the sum of its proper divisors (11512815).

13666065 is a wasteful number, since it uses less digits than its factorization.

13666065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 13666065 is about 3696.7641255563. The cubic root of 13666065 is about 239.0825214126.

The spelling of 13666065 in words is "thirteen million, six hundred sixty-six thousand, sixty-five".