866383651811 has 4 divisors (see below), whose sum is σ = 911982791400. Its totient is φ = 820784512224.

The previous prime is 866383651789. The next prime is 866383651829. The reversal of 866383651811 is 118156383668.

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

It is a cyclic number.

It is not a de Polignac number, because 866383651811 - 2⁶ = 866383651747 is a prime.

It is a super-3 number, since 3×866383651811³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866383651841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22799569766 + ... + 22799569803.

It is an arithmetic number, because the mean of its divisors is an integer number (227995697850).

Almost surely, 2^866383651811 is an apocalyptic number.

866383651811 is a deficient number, since it is larger than the sum of its proper divisors (45599139589).

866383651811 is a wasteful number, since it uses less digits than its factorization.

866383651811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45599139588.

The product of its digits is 4976640, while the sum is 56.

The spelling of 866383651811 in words is "eight hundred sixty-six billion, three hundred eighty-three million, six hundred fifty-one thousand, eight hundred eleven".