13666634 has 4 divisors (see below), whose sum is σ = 20499954. Its totient is φ = 6833316.

The previous prime is 13666607. The next prime is 13666661. The reversal of 13666634 is 43666631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43666631 = 31 ⋅1408601.

It is an interprime number because it is at equal distance from previous prime (13666607) and next prime (13666661).

It can be written as a sum of positive squares in only one way, i.e., 13300609 + 366025 = 3647^2 + 605^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13666594 and 13666603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3416657 + ... + 3416660.

Almost surely, 2^13666634 is an apocalyptic number.

13666634 is a deficient number, since it is larger than the sum of its proper divisors (6833320).

13666634 is an equidigital number, since it uses as much as digits as its factorization.

13666634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6833319.

The product of its digits is 46656, while the sum is 35.

The square root of 13666634 is about 3696.8410839526. The cubic root of 13666634 is about 239.0858395115.

It can be divided in two parts, 1366 and 6634, that added together give a cube (8000 = 20³).

The spelling of 13666634 in words is "thirteen million, six hundred sixty-six thousand, six hundred thirty-four".