1220166600 has 48 divisors (see below), whose sum is σ = 3782518320. Its totient is φ = 325377600.

The previous prime is 1220166569. The next prime is 1220166611. The reversal of 1220166600 is 66610221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1016206 + ... + 1017405.

It is an arithmetic number, because the mean of its divisors is an integer number (78802465).

Almost surely, 2^1220166600 is an apocalyptic number.

1220166600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220166600 is an abundant number, since it is smaller than the sum of its proper divisors (2562351720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220166600 is a wasteful number, since it uses less digits than its factorization.

1220166600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033630 (or 2033621 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1220166600 is about 34930.8831837960. The cubic root of 1220166600 is about 1068.5783664741.

Adding to 1220166600 its reverse (66610221), we get a palindrome (1286776821).

The spelling of 1220166600 in words is "one billion, two hundred twenty million, one hundred sixty-six thousand, six hundred".