13319666 has 4 divisors (see below), whose sum is σ = 19979502. Its totient is φ = 6659832.

The previous prime is 13319641. The next prime is 13319689. The reversal of 13319666 is 66691331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 395641 = 3595^2 + 629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329915 + ... + 3329918.

Almost surely, 2^13319666 is an apocalyptic number.

13319666 is a deficient number, since it is larger than the sum of its proper divisors (6659836).

13319666 is an equidigital number, since it uses as much as digits as its factorization.

13319666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6659835.

The product of its digits is 17496, while the sum is 35.

The square root of 13319666 is about 3649.6117601740. The cubic root of 13319666 is about 237.0451705223.

The spelling of 13319666 in words is "thirteen million, three hundred nineteen thousand, six hundred sixty-six".