13366661 has 12 divisors (see below), whose sum is σ = 16963200. Its totient is φ = 10415160.

The previous prime is 13366649. The next prime is 13366663. The reversal of 13366661 is 16666331.

It is not a de Polignac number, because 13366661 - 2⁶ = 13366597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13366663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11861 + ... + 12938.

It is an arithmetic number, because the mean of its divisors is an integer number (1413600).

Almost surely, 2^13366661 is an apocalyptic number.

13366661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13366661 is a deficient number, since it is larger than the sum of its proper divisors (3596539).

13366661 is a wasteful number, since it uses less digits than its factorization.

13366661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24824 (or 24817 counting only the distinct ones).

The product of its digits is 11664, while the sum is 32.

The square root of 13366661 is about 3656.0444472134. The cubic root of 13366661 is about 237.3236275032.

It can be divided in two parts, 1336 and 6661, that added together give a palindrome (7997).

The spelling of 13366661 in words is "thirteen million, three hundred sixty-six thousand, six hundred sixty-one".