1220370666 has 8 divisors (see below), whose sum is σ = 2440741344. Its totient is φ = 406790220.

The previous prime is 1220370661. The next prime is 1220370689. The reversal of 1220370666 is 6660730221.

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

1220370666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1220370661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101697550 + ... + 101697561.

It is an arithmetic number, because the mean of its divisors is an integer number (305092668).

Almost surely, 2^1220370666 is an apocalyptic number.

1220370666 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.

1220370666 is a wasteful number, since it uses less digits than its factorization.

1220370666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203395116.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 1220370666 is about 34933.8040585333. The cubic root of 1220370666 is about 1068.6379343937.

The spelling of 1220370666 in words is "one billion, two hundred twenty million, three hundred seventy thousand, six hundred sixty-six".