13801066 has 4 divisors (see below), whose sum is σ = 20701602. Its totient is φ = 6900532.

The previous prime is 13801043. The next prime is 13801091. The reversal of 13801066 is 66010831.

13801066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66010831 = 1601 ⋅41231.

It can be written as a sum of positive squares in only one way, i.e., 13579225 + 221841 = 3685^2 + 471^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13801066.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3450265 + ... + 3450268.

Almost surely, 2^13801066 is an apocalyptic number.

13801066 is a deficient number, since it is larger than the sum of its proper divisors (6900536).

13801066 is an equidigital number, since it uses as much as digits as its factorization.

13801066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6900535.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 13801066 is about 3714.9786002075. The cubic root of 13801066 is about 239.8672066308.

Adding to 13801066 its reverse (66010831), we get a palindrome (79811897).

The spelling of 13801066 in words is "thirteen million, eight hundred one thousand, sixty-six".