11666998 has 48 divisors (see below), whose sum is σ = 22161600. Its totient is φ = 4574976.

The previous prime is 11666989. The next prime is 11666999. The reversal of 11666998 is 89966611.

It is a super-2 number, since 2×11666998² = 272237684664008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78228 + ... + 78376.

It is an arithmetic number, because the mean of its divisors is an integer number (461700).

Almost surely, 2^11666998 is an apocalyptic number.

11666998 is a deficient number, since it is larger than the sum of its proper divisors (10494602).

11666998 is a wasteful number, since it uses less digits than its factorization.

11666998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 222 counting only the distinct ones).

The product of its digits is 139968, while the sum is 46.

The square root of 11666998 is about 3415.6987572091. The cubic root of 11666998 is about 226.8052175805.

The spelling of 11666998 in words is "eleven million, six hundred sixty-six thousand, nine hundred ninety-eight".