1220166199 has 6 divisors (see below), whose sum is σ = 1419377064. Its totient is φ = 1045856700.

The previous prime is 1220166193. The next prime is 1220166217. The reversal of 1220166199 is 9916610221.

It is not a de Polignac number, because 1220166199 - 2⁷ = 1220166071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220166193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12450627 + ... + 12450724.

It is an arithmetic number, because the mean of its divisors is an integer number (236562844).

Almost surely, 2^1220166199 is an apocalyptic number.

1220166199 is a deficient number, since it is larger than the sum of its proper divisors (199210865).

1220166199 is an equidigital number, since it uses as much as digits as its factorization.

1220166199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24901365 (or 24901358 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 1220166199 is about 34930.8774438891. The cubic root of 1220166199 is about 1068.5782494136.

It can be divided in two parts, 12201 and 66199, that added together give a square (78400 = 280²).

The spelling of 1220166199 in words is "one billion, two hundred twenty million, one hundred sixty-six thousand, one hundred ninety-nine".