11806658 has 4 divisors (see below), whose sum is σ = 17709990. Its totient is φ = 5903328.

The previous prime is 11806649. The next prime is 11806681. The reversal of 11806658 is 85660811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85660811 = 109 ⋅785879.

It can be written as a sum of positive squares in only one way, i.e., 6775609 + 5031049 = 2603^2 + 2243^2 .

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, 2951663 + ... + 2951666.

Almost surely, 2^11806658 is an apocalyptic number.

11806658 is a deficient number, since it is larger than the sum of its proper divisors (5903332).

11806658 is an equidigital number, since it uses as much as digits as its factorization.

11806658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903331.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 11806658 is about 3436.0817801676. The cubic root of 11806658 is about 227.7066222493.

The spelling of 11806658 in words is "eleven million, eight hundred six thousand, six hundred fifty-eight".