1066611765 has 16 divisors (see below), whose sum is σ = 1752703488. Its totient is φ = 553484736.

The previous prime is 1066611751. The next prime is 1066611769. The reversal of 1066611765 is 5671166601.

It is not a de Polignac number, because 1066611765 - 2¹¹ = 1066609717 is a prime.

It is a super-2 number, since 2×1066611765² = 2275321314472830450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066611769) 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 15 ways as a sum of consecutive naturals, for example, 960357 + ... + 961466.

It is an arithmetic number, because the mean of its divisors is an integer number (109543968).

Almost surely, 2^1066611765 is an apocalyptic number.

1066611765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1066611765 is a deficient number, since it is larger than the sum of its proper divisors (686091723).

1066611765 is a wasteful number, since it uses less digits than its factorization.

1066611765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921868.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1066611765 is about 32659.0227196100. The cubic root of 1066611765 is about 1021.7283796969.

The spelling of 1066611765 in words is "one billion, sixty-six million, six hundred eleven thousand, seven hundred sixty-five".