13142666 has 8 divisors (see below), whose sum is σ = 20873700. Its totient is φ = 6184768.

The previous prime is 13142641. The next prime is 13142693. The reversal of 13142666 is 66624131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12752041 + 390625 = 3571^2 + 625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193241 + ... + 193308.

Almost surely, 2^13142666 is an apocalyptic number.

13142666 is a deficient number, since it is larger than the sum of its proper divisors (7731034).

13142666 is a wasteful number, since it uses less digits than its factorization.

13142666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386568.

The product of its digits is 5184, while the sum is 29.

The square root of 13142666 is about 3625.2815063109. The cubic root of 13142666 is about 235.9904836726.

Adding to 13142666 its reverse (66624131), we get a palindrome (79766797).

The spelling of 13142666 in words is "thirteen million, one hundred forty-two thousand, six hundred sixty-six".