11665500166 has 4 divisors (see below), whose sum is σ = 17498250252. Its totient is φ = 5832750082.

The previous prime is 11665500139. The next prime is 11665500211. The reversal of 11665500166 is 66100556611.

It is a semiprime because it is the product of two primes.

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, 2916375040 + ... + 2916375043.

It is an arithmetic number, because the mean of its divisors is an integer number (4374562563).

Almost surely, 2^11665500166 is an apocalyptic number.

11665500166 is a deficient number, since it is larger than the sum of its proper divisors (5832750086).

11665500166 is an equidigital number, since it uses as much as digits as its factorization.

11665500166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832750085.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 11665500166 in words is "eleven billion, six hundred sixty-five million, five hundred thousand, one hundred sixty-six".