13628666 has 8 divisors (see below), whose sum is σ = 21148020. Its totient is φ = 6579328.

The previous prime is 13628653. The next prime is 13628707. The reversal of 13628666 is 66682631.

It can be written as a sum of positive squares in 2 ways, for example, as 12103441 + 1525225 = 3479^2 + 1235^2 .

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117431 + ... + 117546.

Almost surely, 2^13628666 is an apocalyptic number.

13628666 is a deficient number, since it is larger than the sum of its proper divisors (7519354).

13628666 is a wasteful number, since it uses less digits than its factorization.

13628666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235008.

The product of its digits is 62208, while the sum is 38.

The square root of 13628666 is about 3691.7023173598. The cubic root of 13628666 is about 238.8642284822.

The spelling of 13628666 in words is "thirteen million, six hundred twenty-eight thousand, six hundred sixty-six".