1220066445 has 16 divisors (see below), whose sum is σ = 2102268672. Its totient is φ = 600648000.

The previous prime is 1220066431. The next prime is 1220066459. The reversal of 1220066445 is 5446600221.

It is an interprime number because it is at equal distance from previous prime (1220066431) and next prime (1220066459).

It is not a de Polignac number, because 1220066445 - 2⁶ = 1220066381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3128181 + ... + 3128570.

It is an arithmetic number, because the mean of its divisors is an integer number (131391792).

Almost surely, 2^1220066445 is an apocalyptic number.

1220066445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220066445 is a deficient number, since it is larger than the sum of its proper divisors (882202227).

1220066445 is a wasteful number, since it uses less digits than its factorization.

1220066445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6256772.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1220066445 is about 34929.4495376037. The cubic root of 1220066445 is about 1068.5491282825.

Adding to 1220066445 its reverse (5446600221), we get a palindrome (6666666666).

The spelling of 1220066445 in words is "one billion, two hundred twenty million, sixty-six thousand, four hundred forty-five".