11666906 has 4 divisors (see below), whose sum is σ = 17500362. Its totient is φ = 5833452.

The previous prime is 11666873. The next prime is 11666923. The reversal of 11666906 is 60966611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60966611 = 19 ⋅3208769.

It can be written as a sum of positive squares in only one way, i.e., 11256025 + 410881 = 3355^2 + 641^2 .

It is a super-2 number, since 2×11666906² = 272233391225672, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2916725 + ... + 2916728.

Almost surely, 2^11666906 is an apocalyptic number.

11666906 is a deficient number, since it is larger than the sum of its proper divisors (5833456).

11666906 is an equidigital number, since it uses as much as digits as its factorization.

11666906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5833455.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 11666906 is about 3415.6852899528. The cubic root of 11666906 is about 226.8046214222.

The spelling of 11666906 in words is "eleven million, six hundred sixty-six thousand, nine hundred six".