865076066 has 4 divisors (see below), whose sum is σ = 1297614102. Its totient is φ = 432538032.

The previous prime is 865076041. The next prime is 865076071. The reversal of 865076066 is 660670568.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 645414025 + 219662041 = 25405^2 + 14821^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216269015 + ... + 216269018.

Almost surely, 2^865076066 is an apocalyptic number.

865076066 is a deficient number, since it is larger than the sum of its proper divisors (432538036).

865076066 is a wasteful number, since it uses less digits than its factorization.

865076066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432538035.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 865076066 is about 29412.1754720728. The cubic root of 865076066 is about 952.8358718417.

The spelling of 865076066 in words is "eight hundred sixty-five million, seventy-six thousand, sixty-six".