10991870700166 has 4 divisors (see below), whose sum is σ = 16487806050252. Its totient is φ = 5495935350082.

The previous prime is 10991870700163. The next prime is 10991870700193. The reversal of 10991870700166 is 66100707819901.

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

It is a super-3 number, since 3×10991870700166³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10991870700163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2747967675040 + ... + 2747967675043.

It is an arithmetic number, because the mean of its divisors is an integer number (4121951512563).

Almost surely, 2^{10991870700166} is an apocalyptic number.

10991870700166 is a deficient number, since it is larger than the sum of its proper divisors (5495935350086).

10991870700166 is an equidigital number, since it uses as much as digits as its factorization.

10991870700166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495935350085.

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 10991870700166 in words is "ten trillion, nine hundred ninety-one billion, eight hundred seventy million, seven hundred thousand, one hundred sixty-six".