1066220265 has 16 divisors (see below), whose sum is σ = 1861039296. Its totient is φ = 516955200.

The previous prime is 1066220251. The next prime is 1066220273. The reversal of 1066220265 is 5620226601.

It is not a de Polignac number, because 1066220265 - 2⁴ = 1066220249 is a prime.

It is a super-2 number, since 2×1066220265² = 2273651306993340450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3230806 + ... + 3231135.

It is an arithmetic number, because the mean of its divisors is an integer number (116314956).

Almost surely, 2^1066220265 is an apocalyptic number.

1066220265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1066220265 is a deficient number, since it is larger than the sum of its proper divisors (794819031).

1066220265 is a wasteful number, since it uses less digits than its factorization.

1066220265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6461960.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1066220265 is about 32653.0284200409. The cubic root of 1066220265 is about 1021.6033558833.

Adding to 1066220265 its reverse (5620226601), we get a palindrome (6686446866).

The spelling of 1066220265 in words is "one billion, sixty-six million, two hundred twenty thousand, two hundred sixty-five".