1066765220 has 12 divisors (see below), whose sum is σ = 2240207004. Its totient is φ = 426706080.

The previous prime is 1066765187. The next prime is 1066765237. The reversal of 1066765220 is 225676601.

It can be written as a sum of positive squares in 2 ways, for example, as 433638976 + 633126244 = 20824^2 + 25162^2 .

It is a super-2 number, since 2×1066765220² = 2275976069203296800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26669111 + ... + 26669150.

It is an arithmetic number, because the mean of its divisors is an integer number (186683917).

Almost surely, 2^1066765220 is an apocalyptic number.

1066765220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066765220 is an abundant number, since it is smaller than the sum of its proper divisors (1173441784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1066765220 is a wasteful number, since it uses less digits than its factorization.

1066765220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53338270 (or 53338268 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1066765220 is about 32661.3719858796. The cubic root of 1066765220 is about 1021.7773765344. Note that the first 3 decimals are identical.

The spelling of 1066765220 in words is "one billion, sixty-six million, seven hundred sixty-five thousand, two hundred twenty".