1220043666 has 8 divisors (see below), whose sum is σ = 2440087344. Its totient is φ = 406681220.

The previous prime is 1220043653. The next prime is 1220043667. The reversal of 1220043666 is 6663400221.

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

1220043666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1220043667) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 101670300 + ... + 101670311.

It is an arithmetic number, because the mean of its divisors is an integer number (305010918).

Almost surely, 2^1220043666 is an apocalyptic number.

1220043666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1220043666 is a wasteful number, since it uses less digits than its factorization.

1220043666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203340616.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1220043666 is about 34929.1234645246. The cubic root of 1220043666 is about 1068.5424781988.

Adding to 1220043666 its reverse (6663400221), we get a palindrome (7883443887).

The spelling of 1220043666 in words is "one billion, two hundred twenty million, forty-three thousand, six hundred sixty-six".