1066610281 has 9 divisors (see below), whose sum is σ = 1172784823. Its totient is φ = 969319120.

The previous prime is 1066610267. The next prime is 1066610291. The reversal of 1066610281 is 1820166601.

The square root of 1066610281 is 32659.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6456681 + 1060153600 = 2541^2 + 32560^2 .

It is not a de Polignac number, because 1066610281 - 2⁵ = 1066610249 is a prime.

It is a super-2 number, since 2×1066610281² = 2275314983069797922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066610261) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 357765 + ... + 360733.

Almost surely, 2^1066610281 is an apocalyptic number.

1066610281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1066610281 is the 32659-th square number.

1066610281 is the 16330-th centered octagonal number.

It is an amenable number.

1066610281 is a deficient number, since it is larger than the sum of its proper divisors (106174542).

1066610281 is an frugal number, since it uses more digits than its factorization.

1066610281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960 (or 2980 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The cubic root of 1066610281 is about 1021.7279058457.

Adding to 1066610281 its reverse (1820166601), we get a palindrome (2886776882).

The spelling of 1066610281 in words is "one billion, sixty-six million, six hundred ten thousand, two hundred eighty-one".