11666001 has 8 divisors (see below), whose sum is σ = 15616224. Its totient is φ = 7746560.

The previous prime is 11665963. The next prime is 11666021. The reversal of 11666001 is 10066611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11666001 - 2⁶ = 11665937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11666021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6795 + ... + 8336.

It is an arithmetic number, because the mean of its divisors is an integer number (1952028).

Almost surely, 2^11666001 is an apocalyptic number.

It is an amenable number.

11666001 is a deficient number, since it is larger than the sum of its proper divisors (3950223).

11666001 is a wasteful number, since it uses less digits than its factorization.

11666001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15391.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 11666001 is about 3415.5528103076. The cubic root of 11666001 is about 226.7987568713.

The spelling of 11666001 in words is "eleven million, six hundred sixty-six thousand, one".