1066111261 has 8 divisors (see below), whose sum is σ = 1124974400. Its totient is φ = 1007523360.

The previous prime is 1066111219. The next prime is 1066111283. The reversal of 1066111261 is 1621116601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1066111261 - 2¹³ = 1066103069 is a prime.

It is a super-2 number, since 2×1066111261² = 2273186441662020242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066114261) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 60825 + ... + 76366.

It is an arithmetic number, because the mean of its divisors is an integer number (140621800).

Almost surely, 2^1066111261 is an apocalyptic number.

It is an amenable number.

1066111261 is a deficient number, since it is larger than the sum of its proper divisors (58863139).

1066111261 is a wasteful number, since it uses less digits than its factorization.

1066111261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137619.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1066111261 is about 32651.3592519515. The cubic root of 1066111261 is about 1021.5685404857.

Adding to 1066111261 its reverse (1621116601), we get a palindrome (2687227862).

The spelling of 1066111261 in words is "one billion, sixty-six million, one hundred eleven thousand, two hundred sixty-one".