1066221210 has 64 divisors (see below), whose sum is σ = 2608588800. Its totient is φ = 278853120.

The previous prime is 1066221173. The next prime is 1066221227. The reversal of 1066221210 is 121226601.

It is a super-2 number, since 2×1066221210² = 2273655337307728200, which contains 22 as substring.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 417016 + ... + 419564.

It is an arithmetic number, because the mean of its divisors is an integer number (40759200).

Almost surely, 2^1066221210 is an apocalyptic number.

1066221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1304294400).

1066221210 is an abundant number, since it is smaller than the sum of its proper divisors (1542367590).

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

1066221210 is a wasteful number, since it uses less digits than its factorization.

1066221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1066221210 is about 32653.0428903648. The cubic root of 1066221210 is about 1021.6036577017.

Adding to 1066221210 its reverse (121226601), we get a palindrome (1187447811).

The spelling of 1066221210 in words is "one billion, sixty-six million, two hundred twenty-one thousand, two hundred ten".