13380866 has 4 divisors (see below), whose sum is σ = 20071302. Its totient is φ = 6690432.

The previous prime is 13380863. The next prime is 13380877. The reversal of 13380866 is 66808331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66808331 = 743 ⋅89917.

It can be written as a sum of positive squares in only one way, i.e., 9480241 + 3900625 = 3079^2 + 1975^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13380863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345215 + ... + 3345218.

Almost surely, 2^13380866 is an apocalyptic number.

13380866 is a deficient number, since it is larger than the sum of its proper divisors (6690436).

13380866 is an equidigital number, since it uses as much as digits as its factorization.

13380866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6690435.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 13380866 is about 3657.9866046775. The cubic root of 13380866 is about 237.4076671555.

The spelling of 13380866 in words is "thirteen million, three hundred eighty thousand, eight hundred sixty-six".