220066399 has 16 divisors (see below), whose sum is σ = 257587200. Its totient is φ = 187930680.

The previous prime is 220066397. The next prime is 220066423. The reversal of 220066399 is 993660022.

It is not a de Polignac number, because 220066399 - 2¹ = 220066397 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220066397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105642 + ... + 107704.

It is an arithmetic number, because the mean of its divisors is an integer number (16099200).

Almost surely, 2^220066399 is an apocalyptic number.

220066399 is a deficient number, since it is larger than the sum of its proper divisors (37520801).

220066399 is an equidigital number, since it uses as much as digits as its factorization.

220066399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395 (or 2381 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 220066399 is about 14834.6351151621. The cubic root of 220066399 is about 603.7418006308.

The spelling of 220066399 in words is "two hundred twenty million, sixty-six thousand, three hundred ninety-nine".