11665198 has 4 divisors (see below), whose sum is σ = 17497800. Its totient is φ = 5832598.

The previous prime is 11665189. The next prime is 11665211. The reversal of 11665198 is 89156611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89156611 = 59 ⋅1511129.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2916298 + ... + 2916301.

It is an arithmetic number, because the mean of its divisors is an integer number (4374450).

Almost surely, 2^11665198 is an apocalyptic number.

11665198 is a deficient number, since it is larger than the sum of its proper divisors (5832602).

11665198 is an equidigital number, since it uses as much as digits as its factorization.

11665198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5832601.

The product of its digits is 12960, while the sum is 37.

The square root of 11665198 is about 3415.4352577673. The cubic root of 11665198 is about 226.7935530436.

The spelling of 11665198 in words is "eleven million, six hundred sixty-five thousand, one hundred ninety-eight".