220813066 has 4 divisors (see below), whose sum is σ = 331219602. Its totient is φ = 110406532.

The previous prime is 220813063. The next prime is 220813067. The reversal of 220813066 is 660318022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 187115041 + 33698025 = 13679^2 + 5805^2 .

It is a super-3 number, since 3×220813066³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (220813063) 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 as a sum of consecutive naturals, namely, 55203265 + ... + 55203268.

Almost surely, 2^220813066 is an apocalyptic number.

220813066 is a deficient number, since it is larger than the sum of its proper divisors (110406536).

220813066 is a wasteful number, since it uses less digits than its factorization.

220813066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110406535.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 220813066 is about 14859.7801464221. The cubic root of 220813066 is about 604.4238450870.

It can be divided in two parts, 2208130 and 66, that added together give a square (2208196 = 1486²).

The spelling of 220813066 in words is "two hundred twenty million, eight hundred thirteen thousand, sixty-six".