13031666 has 8 divisors (see below), whose sum is σ = 20002224. Its totient is φ = 6364260.

The previous prime is 13031653. The next prime is 13031671. The reversal of 13031666 is 66613031.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75680 + ... + 75851.

It is an arithmetic number, because the mean of its divisors is an integer number (2500278).

Almost surely, 2^13031666 is an apocalyptic number.

13031666 is a deficient number, since it is larger than the sum of its proper divisors (6970558).

13031666 is a wasteful number, since it uses less digits than its factorization.

13031666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151576.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 13031666 is about 3609.9398886962. The cubic root of 13031666 is about 235.3242302858.

Adding to 13031666 its reverse (66613031), we get a palindrome (79644697).

The spelling of 13031666 in words is "thirteen million, thirty-one thousand, six hundred sixty-six".