13139666 has 8 divisors (see below), whose sum is σ = 19741644. Its totient is φ = 6559120.

The previous prime is 13139653. The next prime is 13139677. The reversal of 13139666 is 66693131.

It can be written as a sum of positive squares in 2 ways, for example, as 12996025 + 143641 = 3605^2 + 379^2 .

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, 3725 + ... + 6336.

Almost surely, 2^13139666 is an apocalyptic number.

13139666 is a deficient number, since it is larger than the sum of its proper divisors (6601978).

13139666 is a wasteful number, since it uses less digits than its factorization.

13139666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10716.

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

The square root of 13139666 is about 3624.8677217245. The cubic root of 13139666 is about 235.9725262474.

The spelling of 13139666 in words is "thirteen million, one hundred thirty-nine thousand, six hundred sixty-six".