11938666 has 4 divisors (see below), whose sum is σ = 17908002. Its totient is φ = 5969332.

The previous prime is 11938643. The next prime is 11938681. The reversal of 11938666 is 66683911.

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., 11758041 + 180625 = 3429^2 + 425^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 2984665 + ... + 2984668.

Almost surely, 2^11938666 is an apocalyptic number.

11938666 is a deficient number, since it is larger than the sum of its proper divisors (5969336).

11938666 is an equidigital number, since it uses as much as digits as its factorization.

11938666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969335.

The product of its digits is 46656, while the sum is 40.

The square root of 11938666 is about 3455.2374737491. The cubic root of 11938666 is about 228.5521270532.

The spelling of 11938666 in words is "eleven million, nine hundred thirty-eight thousand, six hundred sixty-six".