11665426 has 4 divisors (see below), whose sum is σ = 17498142. Its totient is φ = 5832712.

The previous prime is 11665403. The next prime is 11665429. The reversal of 11665426 is 62456611.

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., 11553201 + 112225 = 3399^2 + 335^2 .

It is a super-2 number, since 2×11665426² = 272164327522952, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11665429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2916355 + ... + 2916358.

Almost surely, 2^11665426 is an apocalyptic number.

11665426 is a deficient number, since it is larger than the sum of its proper divisors (5832716).

11665426 is an equidigital number, since it uses as much as digits as its factorization.

11665426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5832715.

The product of its digits is 8640, while the sum is 31.

The square root of 11665426 is about 3415.4686354877. The cubic root of 11665426 is about 226.7950306179.

The spelling of 11665426 in words is "eleven million, six hundred sixty-five thousand, four hundred twenty-six".